Restrict access to the kube-proxy to local pod connections only

[donatwork]

Description

Previously merged to main via PR 516
This PR restricts the access of the kube-proxy port to only connections within the client pod.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
1029
1189

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 90% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have maintained backward compatibility

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

1. Deployed the client and validated that the access to the proxy from outside the pod, within the cluster is blocked. The service is not exported outside the cluster.

[jooseppi-luna]

lgtm, thank you!

[abhi16394]

@donatwork linters checks are failing
Could you check that

[donatwork]

@donatwork linters checks are failing Could you check that

I made no changes to the Go code. The base branch previously had linter errors. Those were fixed in main.

[abhi16394]

LGTM