Add config to increase kube-client qps limit

[Thearas]

What problem does this PR solve?

Close #4829.

What is changed and how does it work?

Add two config kubeClientQPS and kubeClientBurst, they will be passed to kube client-go config.

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

Support for configuring kube-client QPS and Burst: `kubeClientQPS`/`kubeClientBurst`

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• KanShiori
• csuzhangxc

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[codecov-commenter]

Codecov Report

Merging #4830 (2564d7a) into master (e17bccf) will decrease coverage by 17.14%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #4830       +/-   ##
===========================================
- Coverage   59.99%   42.84%   -17.15%     
===========================================
  Files         224      204       -20     
  Lines       25354    25682      +328     
===========================================
- Hits        15211    11004     -4207     
- Misses       8703    13353     +4650     
+ Partials     1440     1325      -115     

Flag	Coverage Δ
e2e	42.84% <100.00%> (?)
unittest	?

[Thearas]

I test with -kube-client-qps=50 -kube-client-burst=100 and -kube-client-qps=0 -kube-client-burst=0 manually, both can work.
PTAL @csuzhangxc

[csuzhangxc]

@KanShiori PTAL

[csuzhangxc]

/test pull-e2e-kind

[csuzhangxc]

/test pull-e2e-kind-across-kubernetes

[csuzhangxc]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 2564d7a

[Thearas]

Hi @csuzhangxc.
Can we cherry-pick this PR to the release-1.4 branch?

[csuzhangxc]

/cherry-pick release-1.4

[ti-chi-bot]

@csuzhangxc: new pull request created to branch release-1.4: #4834.

In response to this:

/cherry-pick release-1.4

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