Webhook config cleanup

[ykaliuta]

• rename serving certificates secret
• remove MutatingWebhookConfiguration references from kustomization
• remove autogenerated misleading labels

Description

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• [ ] Commit messages are meaningful - have a clear and concise summary and detailed explanation of what was changed and why.
• [ ] Pull Request contains a description of the solution, a link to the JIRA issue, and to any dependent or related Pull Request.
• [ ] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• [ ] The developer has manually tested the changes and verified that the changes work

[zdtsw]

put a "onhold" just give @VaishnaviHire more time to check

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zdtsw

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[ykaliuta]

put a "onhold" just give @VaishnaviHire more time to check

Looks like no objections?

[VaishnaviHire]

/lgtm