feat(kubernetes_platform): Update kubernetes_platform go package to include node affinities and pod (anti)affinities

[cjidboon94]

Description of your changes:
Part of #9768 and #9682

This PR adds Node Affinities and Pod Affinities and Anti-Affinities to the kubernetes platform proto file. It also regenerates the Golang stub.

To quote @droctothorpe mentioned in his PR

This PR follows the piece-meal approach that @Tomcli led by example with in #10357 and clarified in #10357 (comment).
We will submit a follow up PR that updates driver.go and another PR that updates the SDK.

All the relevant information about node affinities and pod (anti)affinity is captured in the NodeAffinity and PodAffinity proto messages and should be enough to generate all possible node- and podaffinities.

Checklist:

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[google-oss-prow]

Hi @cjidboon94. 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.

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[Tomcli]

/ok-to-test

[Tomcli]

/lgtm
/assign @chensun

[cjidboon94]

I see there's still a few things missing in the proto. There's no way to distinguish between matchExpressions/matchLabels/matchFields (currently assumed it was all just matchExpressions). And there's some namespace selection stuff that are missing for PodAffinity. Willl add these tomorrow

https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.25/#podaffinityterm-v1-core
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.25/#nodeselectorterm-v1-core

[Tomcli]

/lgtm

[chensun]

/lgtm

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chensun

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[rimolive]

@cjidboon94 Can you please rebase this PR?

[cjidboon94]

@cjidboon94 Can you please rebase this PR?

Done

[google-oss-prow]

@cjidboon94: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
kfp-kubernetes-execution-tests	61cede0	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.

[rimolive]

/lgtm