optimize dedupCurHistories func in ReconcileDaemonSet

[LastNight1997]

Ⅰ. Describe what this PR does

Optimize dedupCurHistories func in ReconcileDaemonSet. Relabeling pods before dedup needn't in for loop.

[kruise-bot]

Welcome @LastNight1997! It looks like this is your first PR to openkruise/kruise 🎉

[FillZpp]

@LastNight1997 Nice change!

But it seems the user name and email of your commit are not your github config (may be some private git config). And you did not signoff yourself.

Please first git config user.name "YOUR_GITHUB_NAME" and git config user.email "YOUR_GITHUB_EMAIL" in your local kruise repo. Then git commit -s --amend and force push again.

[LastNight1997]

@FillZpp Thanks, I have signoff myself.

[FillZpp]

/lgtm

@LastNight1997 Thanks, and you can also help upstream optimize this. https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/daemon/update.go#L360

[kruise-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FillZpp

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