feat: Add ability to hide certain annotations on secret resources

[svghadi]

Closes #15693
Implements hide-annotations.md proposal.
Depends on argoproj/gitops-engine#577

This PR adds ability to define a list of annotations to hide on secret resources. A new hide.secret.annotations key is introduced in argocd-cm configmap which can be used to configure a list of annotation keys to hide on secret resources.

hidden-annotations.mov

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
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