Assess if Gatekeeper CRs can use Custom Resource Field Selectors

[JaydipGabani]

Custom resource field selectors is beta in k8s 1.31 - kubernetes/kubernetes#124681. Let's figure out if we want to use this for Gatekeeper CRDs, and need to make any chages in CRDs respectively to enable Custom Resource Field Selectors.

[stale]

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