Revert "[CI] Constraint transient test dependency on pyobjc"

[Avasam]

Summary of changes

Revert "[CI] Constraint transient test dependency on pyobjc"

This reverts commit 4fd42a06ebcb89f1e41105994b063a518cc05f36.

pyobjc release 12.0 was yanked and 12.1 is properly marked as Python 3.10+

See https://pypi.org/project/pyobjc/12.0/ and https://github.com/ronaldoussoren/pyobjc/issues/661#issuecomment-3533570350

CC @abravalheri

Closes

Pull Request Checklist

• [ ] Changes have tests
• [ ] News fragment added in newsfragments/. (See documentation for details)