karmadactl support rebalance command to trigger a fresh rescheduling

[chaosi-zju]

What type of PR is this?

/kind feature

What this PR does / why we need it:

karmadactl support rebalance command to trigger a fresh rescheduling

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

karmadactl support rebalance command to trigger a fresh rescheduling

[karmada-bot]

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[chaosi-zju]

test report:

$ karmadactl rebalance -h              
Actively triggerring a fresh rescheduling, which disregards the previous assignment entirely and seeks to establish an
entirely new replica distribution across clusters.

Examples:
  # Rebalance deployment(default/nginx)
  karmadactl rebalance deployment nginx -n default
  
  # Rebalance deployment(default/nginx) with gvk
  karmadactl rebalance deployment.v1.apps nginx -n default

Options:
    --dry-run=false:
        Run the command in dry-run mode, without making any server requests.

    --karmada-context='':
        The name of the kubeconfig context to use

    --kubeconfig='':
        Path to the kubeconfig file to use for CLI requests.

    -n, --namespace='':
        If present, the namespace scope for this CLI request

Usage:
  karmadactl rebalance <RESOURCE_TYPE> <RESOURCE_NAME> -n <NAME_SPACE> [options]

Use "karmadactl options" for a list of global command-line options (applies to all commands).

$ karmadactl rebalance deployment nginx
successfully rebalance Deployment default/nginx

$ karmadactl rebalance deployment.v1.apps nginx
successfully rebalance Deployment default/nginx

$ karmadactl rebalance deployment nginxxx      
error: failed to get resource in Karmada. err: the deployment or nginxxx don't exist in Karmada

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Codecov Report

Attention: Patch coverage is 0% with 134 lines in your changes missing coverage. Please review.

Project coverage is 42.90%. Comparing base (ed3f48c) to head (ec0acfd).

Files with missing lines	Patch %	Lines
pkg/karmadactl/rebalance/rebalance.go	0.00%	133 Missing :warning:
pkg/karmadactl/karmadactl.go	0.00%	1 Missing :warning:

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5471      +/-   ##
==========================================
- Coverage   43.00%   42.90%   -0.11%     
==========================================
  Files         656      657       +1     
  Lines       55921    56055     +134     
==========================================
+ Hits        24051    24052       +1     
- Misses      30324    30457     +133     
  Partials     1546     1546              

Flag	Coverage Δ
unittests	42.90% <0.00%> (-0.11%)	:arrow_down:

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[chaosi-zju]

Is there any further comments? If anyone has other suggestions, please let me know~

[chaosi-zju]

Is there any further comments? If anyone has other suggestions, please let me know~

[chaosi-zju]

all comments fixed @zhzhuang-zju

[zhzhuang-zju]

/lgtm assign @RainbowMango

[chaosi-zju]

@RainbowMango can this PR bring to release-1.12 ?

[RainbowMango]

I'm not sure if I have enough bandwidth. Will see.