EasyCLA check should ignore Claude attributions on commits

[rascani]

Summary

Similar to #5062, Claude Code can also add a co-authored attribution on the commit. Can this also be ignored like Cursor was?

<commit message>

Co-authored-by: Claude <noreply@anthropic.com>

Example of failing check: pytorch/executorch#19792 (comment)

Expected behavior

EasyCLA check should ignore all AI Agent contributions.

Environment

Please complete the following information:

• Environment:
  • ALL
  • DEV
  • STAGING
  • PROD
• Browser:
  • Chrome/Brave
  • Firefox
  • Opera
  • Vivaldi
  • LibreWolf
  • SRware Iron
  • Dissenter
  • Slimjet
  • Midori
  • Edge
  • Lynx
• Version: v1.0.XX

Additional Context

-None

Assumptions

• None

Acceptance Criteria

A PR to PyTorch repo made with a Claude AND containing a Claude attribution commit should not be raising the EasyCLA check.