operator/pkg/controlplane/etcd: remove redundant EtcdPeerServiceName

[mohamedawnallah]

Description

In this commit, we remove the redundant field EtcdPeerServiceName in the function installKarmadaEtcd in operator/pkg/controlplane/etcd package.

What type of PR is this?

/kind cleanup

Which issue(s) this PR fixes:
Fixes #5584

Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

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[mohamedawnallah]

cc: @zhzhuang-zju

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 34.83%. Comparing base (4c8bcd4) to head (b04f90a).
Report is 48 commits behind head on master.

Files with missing lines	Patch %	Lines
operator/pkg/controlplane/etcd/etcd.go	0.00%	4 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5592      +/-   ##
==========================================
+ Coverage   34.14%   34.83%   +0.69%     
==========================================
  Files         643      645       +2     
  Lines       44524    44832     +308     
==========================================
+ Hits        15203    15618     +415     
+ Misses      28165    28010     -155     
- Partials     1156     1204      +48     

Flag	Coverage Δ
unittests	34.83% <0.00%> (+0.69%)	⬆️

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