Complete the upgrade started in ACM-8326, focusing on Kubernetes packages.

This includes:

• Bumping the replace directive for client-go to v0.28
• Bumping the controller-runtime version to v0.16
• Refactoring main.go for the new manager options, noting any new options we might be able to leverage and opening issues if so

A sample PR has been opened:
https://github.com/stolostron/cert-policy-controller/pull/227

Notes:

• Be sure to remove the "is deprecated:" exception in the linting rules, if present in build/common/config/.golangci.yml
• Remove any replace directives that aren't CVE-related
• After removing the replaces, doing go get -u all would cover the upgrade, adding back/updating replaces as needed
• Ensure that all Kubernetes client-go in go.sum is at v0.26.4 or higher for compatibility with OCP v4.14