Re-enable reject_build_waiting_for_review after Fastlane upgrade

[mokagio]

Follows up on #23118 (comment) now that @AliSoftware's fastlane/fastlane#21995 has landed and shipped by re-enabling reject_build_waiting_for_review

I opened this against the release branch so we can see it in action sooner rather than later. However, to properly test this one would have to artificially submit two betas in short succession.

Luckily, @AliSoftware already tested the fix in the real world (see fastlane/fastlane#21995 description) so we can be quite confident in merging. Or, at least, as confident as anyone can be when interacting with the brittle ASC API...

Regression Notes

1. Potential unintended areas of impact – N.A.
2. What I did to test those areas of impact (or what existing automated tests I relied on) – N.A.
3. What automated tests I added (or what prevented me from doing so) – N.A.

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PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes. N.A.
• I have considered adding accessibility improvements for my changes. N.A.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary. N.A.

UI changes testing checklist: Not a UI PR.

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 25.1 ❄️. The due date for this milestone has already passed. Please assign it to a milestone with a later deadline or check whether the release for this milestone has already been finished.

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