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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. [Alpha: DynamicKubeletConfig] Double check before setKubeletConfiguration **What this PR does / why we need it**: Double check the `newCfg` is not equal to the `oldCfg` before we call `setKubeletConfiguration(newCfg)` in `tempSetCurrentKubeletConfig()`. **Which issue(s) this PR fixes**: Fixes https://github.com/kubernetes/kubernetes/issues/57701 **Special notes for your reviewer**: /area kubelet /sig node /assign @mtaufen /cc @vishh @jiayingz @derekwaynecarr @dchen1107 @liggitt PTAL, Thanks! **Release note**: ```release-note NONE ```