Reintroduce PR #5974: Remove klogr dependency and move to zap

[aliaqel-stripe]

Reintroducing #5794

This PR reintroduces the above PR to refactor metrics-server to use zap instead of klogr. This not only removes the deprecated dependency but it also enables for JSON logging, a frequently requested feature in the metrics server.

I also updated the dev container protoc version so that it does not overwrite the protoc version used to generate proto.

Additionally, I have

• Updated documentation: Update docs to outline how to set zap log settings in KEDA keda-docs#1543
• Updated Helm: Update helm charts to support zap logging in metrics server charts#741

Checklist

• I have verified that my change is according to the deprecations & breaking changes policy
• Changelog has been updated and is aligned with our changelog requirements
• A PR is opened to update our Helm chart (repo) (if applicable, ie. when deployment manifests are modified)
• A PR is opened to update the documentation on (repo) (if applicable)
• Commits are signed with Developer Certificate of Origin (DCO - learn more)

Fixes #5732 , #4049

Relates to #741, #1543

[semgrep-app]

Semgrep found 1 no-sudo-in-dockerfile finding:

• .devcontainer/Dockerfile
  • L20-81 - Triage

Avoid using sudo in Dockerfiles. Running processes as a non-root user can help reduce the potential impact of configuration errors and security vulnerabilities.

[aliaqel-stripe]

this change appears to have introduced a memory leak, will diagnose and then reach out to review