docs: Failed policy checks block apply regardless of mergeable apply requirement

[erickearns]

what

The docs indicate that the mergeable apply requirement needs to be active in order to block applies based on failing policy checks. This isn't true.

why

Simply enabling policy checks appears to cause enforcement of policies_passed requirement for apply.

tests

I use policy checks without the mergeable apply requirement and they block apply when failing.

references

ValidateApplyProject checks PolicyCleared independently from MergeableRequirement (ref)

[X-Guardian]

Hi @erickearns, can you resolve the conflict on this?