Fix: kruise-rollout chart structure does not follow best practice

[StevenLeiZhang]

Signed-off-by: StevenLeiZhang zhangleiic@163.com

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Fix: #41 Checklist:

• [ ] I have bumped the chart version according to versioning
• [ ] I have updated the chart changelog with all the changes that come with this pull request according to changelog.
• [ ] Any new values are backwards compatible and/or have sensible default.
• [ ] I have signed off all my commits as required by DCO.

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