7ce61d5469
Copy of https://github.com/astral-sh/uv/pull/17753 which GitHub auto-closed. This adds test infrastructure for cross-device links and file systems with reflink support. In short, we create a few extra file systems on the CI runners then provide their paths to the test suite using environment variables to ensure we have coverage. If the variables are not set, the tests are skipped. --------- Co-authored-by: Claude <noreply@anthropic.com>