trainer: "zero-trust" security / networking for training jobs

[Garvit-77]

Description of Changes

This pr includes documentation for enabling users to implement "Zero-trust" network policy

Related Issues

Closes: trainer #2341
Related: trainer #2341

Checklist

• [Y] You have signed off your commits
• [Y] Ensure you follow best practices from our contributing guide.
• [Y] (for big changes) I will post screenshots of the changes in a PR comment

[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[google-oss-prow]

Hi @Garvit-77. Thanks for your PR.

I'm waiting for a kubeflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[Arhell]

/ok-to-test

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.