feat: add informers replicaset transformer

[dongjiang1989]

What type of PR is this? /kind feature

What this PR does / why we need it: add replicaset transform

Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

add replicaset transform

[karmada-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: To complete the pull request process, please assign rainbowmango after the PR has been reviewed. You can assign the PR to them by writing /assign @rainbowmango in a comment when ready.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment

[codecov-commenter]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (9250219) 51.55% compared to head (2cd5fd3) 51.57%.

Files	Patch %	Lines
pkg/util/fedinformer/transform.go	70.37%	8 Missing :warning:

:exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4643      +/-   ##
==========================================
+ Coverage   51.55%   51.57%   +0.01%     
==========================================
  Files         250      250              
  Lines       24904    24931      +27     
==========================================
+ Hits        12840    12857      +17     
- Misses      11358    11367       +9     
- Partials      706      707       +1     

Flag	Coverage Δ
unittests	51.57% <70.37%> (+0.01%)	:arrow_up:

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

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[RainbowMango]

@dongjiang1989 Can you remind me why we need the transformer for ReplicaSet? Seems Karmada won't cache this kind of resource.

[dongjiang1989]

@dongjiang1989 Can you remind me why we need the transformer for ReplicaSet? Seems Karmada won't cache this kind of resource.

Thanks, @RainbowMango. Hmmm... Maybe can use it. like: https://github.com/karmada-io/karmada/blob/f04c17f72749a8db253da7b2790b65d8e912ce24/pkg/estimator/server/server.go#L120

[XiShanYongYe-Chang]

Hi @dongjiang1989, do we still need this pr?