The WebPush.ITPCleanup test (added in 243058) always fails. We should fix this and also clean the tests up a bit so it's easier to test other web push + ITP interactions, e.g. 246468.
<rdar://problem/101228159>
Pull request: https://github.com/WebKit/WebKit/pull/5435
Committed 255648@main (bd280775effe): <https://commits.webkit.org/255648@main> Reviewed commits have been landed. Closing PR #5435 and removing active labels.