Bump kubernetes dependencies to v1.26.2

[RainbowMango]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:
This PR updates Kubernetes dependencies to v1.26.2 which includes the fix for CVE-2022-41723.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Karmada is now built with Kubernetes v1.26.2 dependencies. (fix CVE-2022-41723)

[codecov-commenter]

Codecov Report

Merging #3252 (55ea3fd) into master (fa0791e) will increase coverage by 0.02%.
The diff coverage is n/a.

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@@            Coverage Diff             @@
##           master    #3252      +/-   ##
==========================================
+ Coverage   49.15%   49.18%   +0.02%     
==========================================
  Files         206      206              
  Lines       18377    18377              
==========================================
+ Hits         9033     9038       +5     
+ Misses       8856     8852       -4     
+ Partials      488      487       -1     

Flag	Coverage Δ
unittests	49.18% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/search/proxy/store/util.go	94.31% <0.00%> (+0.94%)	⬆️
pkg/search/proxy/store/store.go	68.42% <0.00%> (+3.15%)	⬆️

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[karmada-bot]

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