Add operator to manage controller in cluster

[wzshiming]

What would you like to be added?

We need to manage the deployment of the controller in various configurations to maintain an optimal ratio of controllers to nodes in the cluster.

• One-to-Many (1:M) Relationship: In this configuration, a single controller is responsible for managing all.
• Many-to-Many (N:M, N<M) Relationship: This configuration is used when there are a large number of nodes. Due to limitations in heartbeat and apiserver QPS, a single controller may not be able to maintain too many nodes. Currently, it is recommended for a controller to maintain up to 1000 nodes.
• Many-to-Many (N:M, N=M) Relationship: In this configuration, the number of controllers is equal to the number of nodes. This is used to simulate the pressure of the same kubelet on the apiserver.

In a Many-to-Many, there may be a need to assign a distinct controller for the management of resources that are not contained within a node or pod.
It’s important to note that managing these resources is not limited to a single controller, as they may also have requirements that necessitate management by multiple controllers.

Why is this needed?

From discussion https://kubernetes.slack.com/archives/C04RG2YSK16/p1716796734402529

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/lifecycle stale

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/lifecycle rotten

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Reopen this issue with /reopen
• Mark this issue as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/close not-planned

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