add pprof option to metrics-adapter

[chaosi-zju]

What type of PR is this?

/kind feature

What this PR does / why we need it:

add pprof option to metrics-adapter.

refer to Profiling Karmada.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

`karmada-metrics-adapter`: Introduced the `--profiling` and `--profiling-bind-address` flags to enable and control profiling.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.76%. Comparing base (dca5c1a) to head (2bfaccf).
Report is 37 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4786      +/-   ##
==========================================
- Coverage   51.77%   51.76%   -0.02%     
==========================================
  Files         250      250              
  Lines       25000    24980      -20     
==========================================
- Hits        12944    12931      -13     
+ Misses      11346    11340       -6     
+ Partials      710      709       -1     

Flag	Coverage Δ
unittests	51.76% <ø> (-0.02%)	⬇️

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[RainbowMango]

/lgtm
/assign @chaunceyjiang

[chaunceyjiang]

Thanks~

/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chaunceyjiang

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[RainbowMango]

Just added a release note to the PR description.
cc @chaosi-zju

[RainbowMango]

Why the --profiling is enabled by default? I remember it should be disabled by default.

      --profiling                                                                                                                                                                                   
                Enable profiling via web interface host:port/debug/pprof/ (default true)
      --profiling-bind-address string                                                                                                                                                               
                The TCP address for serving profiling(e.g. 127.0.0.1:6060, :6060). This is only applicable if profiling is enabled. (default ":6060")