Add discovery.k8s.io/EndpointSlice to ignoredRefreshResources to skip app requeueing

[andrii-korotkov-verkada]

Summary

Currently /Endpoints are skipped when trying to trigger a reconciliation (link). I think discovery.k8s.io/EndpointSlice should be added to the list as well for the same reasons. Also, skipResourceUpdate should be done after skipAppRequeuing check for optimization.

Motivation

Do an additional optimization to reduce reconciliations. Other resources like pods would already trigger reconciliations when there are relevant updates.

Proposal

Just update the dictionary of ignoredRefreshResources mentioned above to include the entry for discovery.k8s.io/EndpointSlice

[AnkurManna]

If approved, I'm willing to provide the PR.

[AnkurManna]

Please review argoproj/gitops-engine#596, as only after merging this i will be able to use these changes in argo-cd repo like https://argo-cd.readthedocs.io/en/stable/developer-guide/dependencies/ for the final pr.