API Server: memory management related flags

[rsafonseca]

This PR removes an unsupported option and adds the existing supported options to have some basic control over some parts of apiserver memory usage

Remove targetRamMb option, which was removed in kubernetes 1.24. Addresses #14276
Add watchCache and watchCacheSizes apiserver flags

[k8s-ci-robot]

Hi @rsafonseca. Thanks for your PR.

I'm waiting for a kubernetes 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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[hakman]

/ok-to-test

[hakman]

Thanks @rsafonseca. Looks ok to me.
Before merging, would you mind squashing the commits?

[rsafonseca]

squashed, @hakman :)

[k8s-ci-robot]

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