Fix: Outdated and broken Image Provider (lorempixel / via.placeholder)

[damidani]

Description

The original image source (http://lorempixel.com/ and its fallback https://via.placeholder.com) used by the Faker\Provider\Image class is down or completely unstable. This causes all image generation and download requests (Image::imageUrl() and Image::image()) to fail.

To fix this and restore functional seeding, the provider needs to be updated to a reliable service like Picsum Photos (https://picsum.photos), while handling redirect headers properly.

Steps to Reproduce

1. Call Faker\Provider\Image::imageUrl() or Faker\Provider\Image::image().
2. Notice the network failure, timeout, or empty file generation.

Expected Behavior

The provider should return a valid, accessible image URL or successfully download a random placeholder image to the local disk.