Performance improve for karmada-controller-manager

[Poor12]

Signed-off-by: Poor12 [email protected]

What type of PR is this? /kind feature

What this PR does / why we need it: As is talked in #1858，when member cluster is large(3k nodes, 10w pods), karmada-controller-manager is easy to be OOMkilled and retry to sync nodes and pods again and again.

Based on #2008, I tested the two clusters with 100 nodes and almost 300 pods. We can easily see that in cluster status controllers, list nodes and pods periodicly cost a lot when the cluster is large(a lot of unmarshal works) according to the frame graph.

So I modified the mechanism from full amount list to watch based on event to make the memory increase more stable.

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?: None

[karmada-bot]

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[Poor12]

cc @RainbowMango