Update for pyroma 5.0

[radarhere]

pyroma 5.0 has been released, and it is causing failures - https://github.com/python-pillow/Pillow/actions/runs/16298847553/job/46046857802#step:11:5143

This PR

• reverts a test_pyroma.py change for iOS from Add support for iOS #9030. The test won't actually run on iOS until gh-135966: Modify iOS testbed to make app_packages a site directory python/cpython#135967 lands (see discussion in Run selftest directly freakboy3742/Pillow#5), so I accept that this will fail at some point in the future, and we can fix it then. If @freakboy3742 wants to test it and offer an alternative solution, feel free.
• update the manifest
• embed_pil.c is a file created by our test suite. Rather than adding it to the manifest, let's actually remove it once the test has finished

[freakboy3742]

Getting the fix for iOS in place will require an update to the iOS support package, then a cibuildwheel release to make that support package the default version. The former is on my todo list (I'm a little distracted by EuroPython this week); the latter then comes down to cibuildwheel's release cadence, but given 3.14-rc1 will be out shortly, I can't imagine a release would be that far behind.

[hugovk]

Shall we add teardown_method to this class to delete it, to save an indent?

https://docs.pytest.org/en/stable/how-to/xunit_setup.html#method-and-function-level-setup-teardown

[radarhere]

Ok, I've pushed a commit.

[hugovk]

Thanks!