CI: Test on Windows arm64 runners

[weiji14]

Description of proposed changes

Because why not have more failing Windows tests 😆

References:

• https://github.blog/changelog/2025-04-14-windows-arm64-hosted-runners-now-available-in-public-preview/

Similar to #3778 but for Windows

Preview:

Reminders

• Run make format and make check to make sure the code follows the style guide.
• Add tests for new features or tests that would have caught the bug that you're fixing.
• Add new public functions/methods/classes to doc/api/index.rst.
• Write detailed docstrings for all functions/methods.
• If wrapping a new module, open a 'Wrap new GMT module' issue and submit reasonably-sized PRs.
• If adding new functionality, add an example to docstrings or tutorials.

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You can write slash commands (/command) in the first line of a comment to perform
specific operations. Supported slash command is:

• /format: automatically format and lint the code

[weiji14]

Getting an error on the setup-micromamba step at https://github.com/GenericMappingTools/pygmt/actions/runs/14458118336/job/40545485415?pr=3911:

Error: Unsupported platform: win32-arm64

I see that only win_arm64 as supported at https://github.com/mamba-org/mamba/blob/64a620a2aa046d7508a302a06d63f49425b48b7b/libmamba/include/mamba/specs/platform.hpp#L42 from mamba-org/mamba#2745. Maybe something needs to change on mamba, or the GitHub Actions runner. Edit: actually, probably need an extra entry here - https://github.com/mamba-org/setup-micromamba/blob/d17c2171caa36ec145ac7e4658406a66d9af236d/src/util.ts#L24-L31

[weiji14]

Ok, setup-micromamba has Windows ARM now, but many dependencies are still missing windows-arm builds. Traceback from windows-11-arm - Python 3.14 run at https://github.com/GenericMappingTools/pygmt/actions/runs/30134638554/job/89615978772?pr=3911#step:4:55:

Details

  error    libmamba Could not solve for environment specs
      The following packages are incompatible
      ├─ contextily =* * is not installable because there are no viable options
      │  ├─ contextily [1.0.0|1.0.1|...|1.7.1] would require
      │  │  └─ matplotlib-base =* *, which does not exist (perhaps a missing channel);
      │  ├─ contextily 1.0rc2 would require
      │  │  └─ matplotlib =* *, which does not exist (perhaps a missing channel);
      │  └─ contextily [0.9.2|0.99.0|1.0rc1] would require
      │     └─ cartopy =* *, which does not exist (perhaps a missing channel);
      ├─ geopandas =* * is not installable because there are no viable options
      │  ├─ geopandas [1.0.0|1.0.1|...|1.1.4] would require
      │  │  └─ matplotlib-base =* *, which does not exist (perhaps a missing channel);
      │  ├─ geopandas 0.14.4 would require
      │  │  └─ fiona >=1.8.21 *, which does not exist (perhaps a missing channel);
      │  ├─ geopandas [0.14.0|0.14.1|0.14.2|0.14.3] would require
      │  │  └─ fiona >=1.8.21,<1.10.0a0 *, which does not exist (perhaps a missing channel);
      │  ├─ geopandas 0.13.2 would require
      │  │  └─ fiona >=1.8.19,<1.10.0a0 *, which does not exist (perhaps a missing channel);
      │  ├─ geopandas [0.12.1|0.12.2|0.13.0|0.13.1|0.13.2] would require
      │  │  └─ fiona <1.10.0a0 *, which does not exist (perhaps a missing channel);
      │  └─ geopandas [0.10.0|0.10.1|...|0.9.0] would require
      │     └─ fiona =* *, which does not exist (perhaps a missing channel);
      ├─ ghostscript =10.7.1 * does not exist (perhaps a typo or a missing channel);
      ├─ gmt =6.6.0 * does not exist (perhaps a typo or a missing channel);
      ├─ make =* * does not exist (perhaps a typo or a missing channel);
      ├─ netcdf4 =* * does not exist (perhaps a typo or a missing channel);
      ├─ numpy =2.5 * does not exist (perhaps a typo or a missing channel);
      ├─ pandas =* * does not exist (perhaps a typo or a missing channel);
      ├─ pyarrow-core =* * does not exist (perhaps a typo or a missing channel);
      ├─ pytest-mpl =* * is not installable because there are no viable options
      │  ├─ pytest-mpl 0.19.0 would require
      │  │  └─ matplotlib-base >=3.5.3 *, which does not exist (perhaps a missing channel);
      │  ├─ pytest-mpl 0.18.0 would require
      │  │  └─ matplotlib-base >=3.3.3 *, which does not exist (perhaps a missing channel);
      │  ├─ pytest-mpl [0.11|0.12|...|0.17.0] would require
      │  │  └─ matplotlib-base =* *, which does not exist (perhaps a missing channel);
      │  └─ pytest-mpl [0.10|0.11|0.8|0.9] would require
      │     └─ matplotlib =* *, which does not exist (perhaps a missing channel);
      ├─ rioxarray =* * is not installable because there are no viable options
      │  ├─ rioxarray [0.21.0|0.22.0] would require
      │  │  └─ rasterio >=1.4.3 *, which does not exist (perhaps a missing channel);
      │  ├─ rioxarray [0.20.0|0.21.0] would require
      │  │  └─ numpy >=2 *, which does not exist (perhaps a missing channel);
      │  ├─ rioxarray [0.15.1|0.15.2|...|0.20.0] would require
      │  │  └─ numpy >=1.23 *, which does not exist (perhaps a missing channel);
      │  ├─ rioxarray [0.13.3|0.13.4|0.14.0|0.14.1|0.15.0] would require
      │  │  └─ numpy >=1.21 *, which does not exist (perhaps a missing channel);
      │  ├─ rioxarray [0.10.0|0.10.1|...|0.9.1] would require
      │  │  └─ pyproj >=2.2 *, which does not exist (perhaps a missing channel);
      │  ├─ rioxarray [0.0.27|0.0.28|...|0.4.0] would require
      │  │  └─ pyproj >=2 *, which does not exist (perhaps a missing channel);
      │  ├─ rioxarray [0.0.18|0.0.19|...|0.0.26] would require
      │  │  └─ pillow =* *, which does not exist (perhaps a missing channel);
      │  └─ rioxarray [0.0.10|0.0.11|...|0.0.9] would require
      │     └─ rasterio =* *, which does not exist (perhaps a missing channel);
      ├─ sphinx-gallery =* * is not installable because there are no viable options
      │  ├─ sphinx-gallery [0.16.0|0.17.0|...|0.21.0] would require
      │  │  └─ pillow =* *, which does not exist (perhaps a missing channel);
      │  ├─ sphinx-gallery [0.10.0|0.10.1|...|0.9.0] would require
      │  │  └─ matplotlib-base =* *, which does not exist (perhaps a missing channel);
      │  └─ sphinx-gallery 0.5.0 would require
      │     └─ matplotlib =* *, which does not exist (perhaps a missing channel);
      └─ xarray =* * is not installable because there are no viable options
         ├─ xarray [2025.10.1|2025.11.0|...|2026.7.0] would require
         │  └─ numpy >=1.26 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2024.10.0|2024.11.0|...|2025.6.1] would require
         │  └─ numpy >=1.24 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2024.5.0|2024.6.0|2024.7.0] would require
         │  └─ numpy >=1.23 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2024.1.0|2024.1.1|2024.2.0|2024.3.0] would require
         │  └─ numpy >=1.23,<2.0a0 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2023.10.0|2023.10.1|2023.11.0|2023.12.0|2023.8.0] would require
         │  └─ numpy >=1.22,<2.0a0 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2023.2.0|2023.3.0|...|2023.9.0] would require
         │  └─ numpy >=1.21,<2.0a0 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2022.10.0|2022.11.0|2022.12.0|2023.1.0] would require
         │  └─ numpy >=1.20 *, which does not exist (perhaps a missing channel);
         ├─ xarray [2022.6.0|2022.9.0] would require
         │  └─ numpy >=1.19 *, which does not exist (perhaps a missing channel);
         ├─ xarray [0.20.0|0.20.1|...|2022.6.0] would require
         │  └─ numpy >=1.18 *, which does not exist (perhaps a missing channel);
         ├─ xarray [0.15.1|0.16.0|...|0.19.0] would require
         │  └─ numpy >=1.17 *, which does not exist (perhaps a missing channel);
         ├─ xarray 0.15.0 would require
         │  └─ numpy >=1.15 *, which does not exist (perhaps a missing channel);
         ├─ xarray [0.14.0|0.14.1] would require
         │  └─ numpy >=1.14 *, which does not exist (perhaps a missing channel);
         └─ xarray [0.12.0|0.12.1|0.12.2|0.12.3|0.13.0] would require
            └─ numpy >=1.12 *, which does not exist (perhaps a missing channel).
  critical libmamba Could not solve for environment specs

Need to wait for a whole bunch of packages (numpy, gmt itself, etc), see status on https://conda-forge.org/status/migration/?name=supportwindowsarm64platform.