Enable caching for the ip_enforcement_prevents_access policy

What does this MR do and why?

Enable caching for the ip_enforcement_prevents_access policy

This caching was firstly introduced in !97396 (merged), but then reverted in !154906 (merged).

However, the concern about it may not be correct because every request has different IP already.

References

part of #549069 (closed)

Please see !97396 (comment 2613631326)

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