chore: enable unnecessary-stmt rule from revive

[mmorel-35]

Description

unnecessary-stmt: This rule suggests to remove redundant statements like a break at the end of a case block, for improving the code's readability.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mmorel-35
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[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 68.73%. Comparing base (88b3938) to head (c41fdfd).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
server/etcdmain/etcd.go	0.00%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
server/storage/wal/repair.go	55.35% <100.00%> (-0.79%)	⬇️
server/etcdmain/etcd.go	0.00% <0.00%> (ø)

... and 27 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19155      +/-   ##
==========================================
- Coverage   68.87%   68.73%   -0.15%     
==========================================
  Files         420      420              
  Lines       35642    35639       -3     
==========================================
- Hits        24549    24496      -53     
- Misses       9675     9716      +41     
- Partials     1418     1427       +9     

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[mmorel-35]

/retest