feat(k8s-discovery): support mTLS

[e1ijah1]

Description

support mTLS authentication with kubernetes apiserver for discovery

Fixes#7516

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[spacewander]

It would be better to set up a mtls proxy in the CI. Pros:

1. don't need to touch current k8s config
2. don't need to add cert config in non-mtls test
3. we can cover non-mtls path in the test
4. we can test different cert without duplicate k8s env

[spacewander]

Please make the CI pass, thanks!

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If you think that's incorrect or this pull request should instead be reviewed, please simply write any comment. Even if closed, you can still revive the PR at any time or discuss it on the dev@apisix.apache.org list. Thank you for your contributions.

[moonming]

@e1ijah1 do you have time to fix comments and make CI happy? thanks

[e1ijah1]

@e1ijah1 do you have time to fix comments and make CI happy? thanks

I would like to try to fix the CI this weekend😊

[moonming]

@e1ijah1 do you have time to fix comments and make CI happy? thanks

I would like to try to fix the CI this weekend😊

great 👍

[Revolyssup]

@e1ijah1 Any progress so far here?

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If you think that's incorrect or this pull request should instead be reviewed, please simply write any comment. Even if closed, you can still revive the PR at any time or discuss it on the dev@apisix.apache.org list. Thank you for your contributions.

[github-actions]

This pull request/issue has been closed due to lack of activity. If you think that is incorrect, or the pull request requires review, you can revive the PR at any time.

[Revolyssup]

@e1ijah1 Are you still working on this PR?

[Revolyssup]

@e1ijah1 Can you resolve the merge conflicts and make some progress on this PR?

[Revolyssup]

@e1ijah1 Looks like you're no longer available. Maybe @shreemaan-abhishek can take this one.

[nitishfy]

Is there anyone working on this issue?

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 4 weeks if no further activity occurs. If you think that's incorrect or this pull request should instead be reviewed, please simply write any comment. Even if closed, you can still revive the PR at any time or discuss it on the dev@apisix.apache.org list. Thank you for your contributions.

[github-actions]

This pull request/issue has been closed due to lack of activity. If you think that is incorrect, or the pull request requires review, you can revive the PR at any time.