[WIP] Add chaos stages

[wzshiming]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes:

Base on #1017

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Add chaos stages

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

NONE

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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/lifecycle stale

[k8s-triage-robot]

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/lifecycle rotten

[k8s-ci-robot]

PR needs rebase.

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[k8s-triage-robot]

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

This bot triages PRs according to the following rules:

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/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

In response to this:

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

This bot triages PRs according to the following rules:

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/close

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