feat: introducing a karmadactl top command

[chaunceyjiang]

What type of PR is this? /kind feature

What this PR does / why we need it:

The difference between kubectl and karmadactl lies in the fact that karmadactl has introduced a new column called "Cluster", which allows you to view the resource usage of pods in different clusters.

Please see more details.

https://github.com/karmada-io/karmada/pull/3578#issuecomment-1562449707

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

`karmadactl`: Introduced `top` command.

[chaunceyjiang]

[codecov-commenter]

Codecov Report

Merging #3593 (62482f4) into master (25db1e0) will decrease coverage by 0.02%. Report is 2 commits behind head on master. The diff coverage is n/a.

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@@            Coverage Diff             @@
##           master    #3593      +/-   ##
==========================================
- Coverage   54.71%   54.69%   -0.02%     
==========================================
  Files         229      229              
  Lines       22074    22074              
==========================================
- Hits        12077    12074       -3     
- Misses       9351     9354       +3     
  Partials      646      646              

Flag	Coverage Δ
unittests	54.69% <ø> (-0.02%)	:arrow_down:

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see 1 file with indirect coverage changes

[chaunceyjiang]

[chaunceyjiang]

/cc @carlory @lonelyCZ Please take a look.

[jwcesign]

Can we push it forward?

[chaunceyjiang]

/cc @jwcesign PTAL.

[chaunceyjiang]

/cc @RainbowMango @carlory @lonelyCZ

[chaunceyjiang]

Is the output sorted by default?

Default Sorting

1. Sort by cluster name
2. Sort by resource namespace
3. Sort by resource name

[chaunceyjiang]

[chaunceyjiang]

/cc @RainbowMango Updated.

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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