[Task] VX-225: Refactor the prometheus

[WakeupTsai]

No description provided.

[codecov-io]

Codecov Report

Merging #190 into develop will increase coverage by 0.47%.
The diff coverage is 87.4%.

@@             Coverage Diff             @@
##           develop     #190      +/-   ##
===========================================
+ Coverage    78.95%   79.43%   +0.47%     
===========================================
  Files           45       46       +1     
  Lines         2229     2334     +105     
===========================================
+ Hits          1760     1854      +94     
- Misses         364      374      +10     
- Partials       105      106       +1

Impacted Files	Coverage Δ
src/prometheuscontroller/expression.go	58.33% <58.33%> (-26.95%)	⬇️
src/prometheuscontroller/query.go	88.88% <81.81%> (-5.4%)	⬇️
src/server/handler_prometheus.go	66.43% <87.5%> (-5.17%)	⬇️
src/prometheuscontroller/controller.go	90.02% <90.02%> (ø)
src/pod/pod.go	93.26% <0%> (-0.63%)	⬇️
src/net/http/handler.go	100% <0%> (ø)	⬆️

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