chore: support specifying canary pods

[leon-inf]

#9384, #9283

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 60.20%. Comparing base (2ec1df5) to head (dd9a7c2).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/factory/builder.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9385      +/-   ##
==========================================
+ Coverage   60.05%   60.20%   +0.14%     
==========================================
  Files         391      391              
  Lines       47732    47736       +4     
==========================================
+ Hits        28667    28741      +74     
+ Misses      16272    16206      -66     
+ Partials     2793     2789       -4     

Flag	Coverage Δ
unittests	60.20% <0.00%> (+0.14%)	⬆️

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[leon-inf]

/approve