Add an admission webhook for cluster crd

[yzxiu]

Signed-off-by: yzx 946666800@qq.com

What type of PR is this?

/kind feature

What this PR does / why we need it:

Add an admission webhook for cluster crd to check cluster ID (kube-system UID) before updating

Does this PR introduced a user-facing change?

Must be used with the updated ks-controller-manager to avoid cluster crd update failures.

see kubesphere/kubesphere#5299

[yzxiu]

/assign @pixiake

[wansir]

/lgtm

[ks-ci-bot]

LGTM label has been added.

Git tree hash: 5f18e2cc8d820e317d9536aa06ce4b1c342604b8

[pixiake]

/cherry-pick release-3.3

/approve

[ks-ci-bot]

@pixiake: once the present PR merges, I will cherry-pick it on top of release-3.3 in a new PR and assign it to you.

In response to this:

/cherry-pick release-3.3

/approve

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[ks-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pixiake, yzxiu

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• OWNERS [pixiake]

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[ks-ci-bot]

@pixiake: new pull request created: #2162

In response to this:

/cherry-pick release-3.3

/approve

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.