[Internal]: do not force swiftshader on chromium mac

[dgozman]

Version

1.58

Steps to reproduce

See "screenshot.spec.ts > should work with large size".

Expected behavior

Should pass.

Actual behavior

Does not!

Additional context

No response

Environment

macOS

[dgozman]

Regressed by https://chromium-review.googlesource.com/c/chromium/src/+/7128438. Upstream issue comment. Failing roll: https://github.com/microsoft/playwright/pull/38470.