sidecarSet support namespace selector inject

[hantmac]

Signed-off-by: hantmac [email protected]

Ⅰ. Describe what this PR does

SidecarSet support namespace selector pod inject.

Ⅱ. Does this pull request fix one issue?

Fix https://github.com/openkruise/kruise/issues/948

[kruise-bot]

@hantmac: PR needs rebase.

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[stale[bot]]

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.

[kruise-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[zmberg]

/assign @zmberg