fix bug for pod status in replicaSet

[zehuaiWANG]

bug fix: refer to issue #4696

In addition, I don't think we need to judge all the pods under the namespace, just judge the pods selected by the label selector

[codecov]

Codecov Report

Merging #4698 into master will decrease coverage by 0.01%.
The diff coverage is 23.07%.

@@            Coverage Diff             @@
##           master    #4698      +/-   ##
==========================================
- Coverage   45.39%   45.38%   -0.02%     
==========================================
  Files         214      214              
  Lines        9976     9980       +4     
  Branches       96       96              
==========================================
  Hits         4529     4529              
- Misses       5181     5185       +4     
  Partials      266      266

Impacted Files	Coverage Δ
src/app/backend/resource/replicaset/pods.go	28.94% <23.07%> (-3.41%)	⬇️

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[floreks]

In addition, I don't think we need to judge all the pods under the namespace, just judge the pods selected by the label selector

ReplicaSet can't control pods across namespaces, but different namespace can have pod with the same name, so it could cause conflicts.

/lgtm

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