chore: remove the sharding selector of cluster service

[leon-inf]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 79.56989% with 19 lines in your changes missing coverage. Please review.

Project coverage is 61.17%. Comparing base (beedc37) to head (ed0bcf7).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
controllers/apps/transformer_cluster_service.go	78.16%	14 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8210      +/-   ##
==========================================
+ Coverage   60.97%   61.17%   +0.20%     
==========================================
  Files         350      350              
  Lines       40595    40571      -24     
==========================================
+ Hits        24753    24820      +67     
+ Misses      13586    13510      -76     
+ Partials     2256     2241      -15     

Flag	Coverage Δ
unittests	61.17% <79.56%> (+0.20%)	⬆️

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