chore: update docs for ClusterTolerations in CRDs and API types

[abhinav-1305]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Which issue(s) this PR fixes: Part of #6428

Special notes for your reviewer: NA

Does this PR introduce a user-facing change?:

NONE

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[zhzhuang-zju]

@abhinav-1305 The CI failed due to the file pkg/generated/openapi/zz_generated.openapi.go is out of date. You can run hack/update-codegen.sh locally and submit the related changes to fix the issue~ Besides, since the issue #6428 has multiple tasks, using "part of" here can prevent the issue from being closed by mistake.