feat: Add QPS related parameters to control the request rate of metrics-adapter to member clusters.

[chaunceyjiang]

What type of PR is this? /kind bug

What this PR does / why we need it:

Add QPS related parameters to control the request rate of metrics-adapter to member clusters.

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

karmada-metrics-adapter: Add QPS related parameters to control the request rate of metrics-adapter to member clusters.

[chaunceyjiang]

/cc @chaosi-zju PTAL.

[chaosi-zju]

we can update the release note

[chaosi-zju]

As a client, adapter has a Burst/QPS limit by default, and when the request volume is too large, it will wait for a long time.

However, when the adapter receives too many upstream (karmada-apiserver) requests and its own downstream (member cluster apiserver) requests are restricted, it will cause a backlog of requests, which in turn causes adapter memory to continue to rise.

Therefore, by setting a reasonable Burst/QPS parameter, memory rise problem can be avoided.

/LGTM

[chaunceyjiang]

/kind feature

[chaunceyjiang]

/kind-remove bug

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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