feat(Backend + SDK): Update kfp backend and kubernetes sdk to support pod labels and annotations

[Tomcli]

Description of your changes:
Part of #9714 and #9768
Fixes #10363

Update kfp backend and kubernetes sdk to support pod labels and annotations.
The pod metadata is not part of the pod spec, we can't simply update the podSpecPatch for Argo, so we need to parse the kubernetes_platform spec in the compiler and add the pod labels and annotations in the Argo container definition.

Also fixing go lint style from #10288

Checklist:

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[connor-mccarthy]

SDK changes LGTM! Thank you!

/assign @chensun for backend changes review.

[Tomcli]

/assign @chensun
Let me know if you need any other changes in the backend. Thank you.

[roytman]

Thank you @Tomcli
/lgtm

[google-oss-prow]

@roytman: changing LGTM is restricted to collaborators

In response to this:

Thank you @Tomcli
/lgtm

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[Tomcli]

@chensun Could you help review this PR? Thank you.

[chensun]

/lgtm
/approve

Thanks, @Tomcli !

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chensun

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[chensun]

/lgtm

[google-oss-prow]

@Tomcli: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
kubeflow-pipelines-samples-v2	133ccb1	link	false	/test kubeflow-pipelines-samples-v2
kfp-kubernetes-execution-tests	133ccb1	link	false	/test kfp-kubernetes-execution-tests

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[pffijt]

Can you release a new version of kfp-kubernetes? We are missing this functionality