build(deps): Bump k8s deps to v0.29.2.

[liangyuanpeng]

• Update test version of kubernetes to v1.29.2.

What this PR does / why we need it:

• Update go version to v1.21 (same with kubernetes v1.29)
• Bump k8s deps to v1.29.2
• Update README for compatibility matrix.
• Update test version of kubernetes to v1.29.2

How does this change affect the cardinality of KSM: (increases, decreases or does not change cardinality)
not change

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #2323

[k8s-ci-robot]

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[liangyuanpeng]

I think it's waiting for :

• chore: Cut v2.11.0  #2317

[dashpole]

dup of #2335