[release-1.23] fix: should update dns label if target pip already have one and it needs update #2702
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This is an automated cherry-pick of #2665
What type of PR is this?
/kind bug
/kind regression
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes #
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Does this PR introduce a user-facing change?
Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.: