[Pillow] pillow-wheels has been incorporated into Pillow

[radarhere]

Two changes for the pillow project.

1. Pillow previously had a separate repository for wheel building scripts - https://github.com/python-pillow/pillow-wheels

However, that has been incorporated into the main repository for simplicity - python-pillow/Pillow#7418

So this PR updates the project here to use the new location.

2. Pillow's oss-fuzz CI job is currently failing because pip is too old. So this PR updates it.

cc @hugovk

[github-actions]

radarhere has previously contributed to projects/pillow. The previous PR was #9681