Keep one Kube client create function

[hzxuzhonghu]

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 5.00000% with 19 lines in your changes missing coverage. Please review.

Project coverage is 48.09%. Comparing base (edc7c5e) to head (a6a6bb2). Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/kube/kubeclient.go	0.00%	16 Missing :warning:
pkg/bpf/restart/bpf_restart.go	0.00%	1 Missing :warning:
pkg/cni/plugin/plugin.go	0.00%	1 Missing :warning:
pkg/controller/controller.go	0.00%	1 Missing :warning:

Files with missing lines	Coverage Δ
pkg/controller/config/config.go	60.00% <100.00%> (ø)
pkg/kube/informer.go	100.00% <ø> (ø)
pkg/bpf/restart/bpf_restart.go	44.89% <0.00%> (+0.89%)	:arrow_up:
pkg/cni/plugin/plugin.go	0.00% <0.00%> (ø)
pkg/controller/controller.go	0.00% <0.00%> (ø)
pkg/kube/kubeclient.go	0.00% <0.00%> (ø)

... and 3 files with indirect coverage changes

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[LiZhenCheng9527]

/lgtm /approve

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: LiZhenCheng9527

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