change hot upgrade type

[cqnkjsx]

Ⅰ. Describe what this PR does

In our specific situation, we need to hotupgrade a pod even this pod has a notready container.But when a main container converts from ready status to notready status we consider it caused by the hotupgrade process and it cannot be successfully updated.

1. We set it as a configurable feature. It can be enabled in config or cmd.
2. We add judgement on whether a pod can be successfully hotupgraded.

Ⅱ. Does this pull request fix one issue?

NONE

Ⅲ. Describe how to verify it

We have added some unit tests to verify the whole process.

Ⅳ. Special notes for reviews

[sonatype-lift]

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[kruise-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[kruise-bot]

Welcome @cqnkjsx! It looks like this is your first PR to openkruise/kruise 🎉

[sonatype-lift]

S1023: redundant return statement

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[kruise-bot]

@cqnkjsx: PR needs rebase.

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.