supplement metric and expand the ability to add external metric

[waynepeking348]

What type of PR is this?

enhancements

What this PR does / why we need it:

1. add metric for rss, cache and cpu usage for cgroup v2
2. expand the ability to add external metric

[codecov]

Codecov Report

Patch coverage: 51.86% and project coverage change: -0.66 ⚠️

Comparison is base (21d86d9) 51.30% compared to head (c88ed79) 50.64%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #131      +/-   ##
==========================================
- Coverage   51.30%   50.64%   -0.66%     
==========================================
  Files         318      390      +72     
  Lines       32418    37180    +4762     
==========================================
+ Hits        16632    18831    +2199     
- Misses      13840    16224    +2384     
- Partials     1946     2125     +179     

Flag	Coverage Δ
unittest	50.64% <51.86%> (-0.66%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/base/context_fake.go	70.28% <ø> (ø)
cmd/katalyst-agent/app/agent/eviction.go	0.00% <0.00%> (ø)
pkg/agent/evictionmanager/endpoint/endpoint.go	0.00% <ø> (ø)
pkg/agent/qrm-plugins/advisorsvc/advisor_svc.pb.go	10.43% <ø> (ø)
...ins/cpu/dynamicpolicy/calculator/cpu_assignment.go	77.01% <ø> (ø)
...gins/cpu/dynamicpolicy/cpueviction/cpu_eviciton.go	0.00% <0.00%> (-63.25%)	⬇️
pkg/agent/qrm-plugins/cpu/dynamicpolicy/policy.go	43.49% <ø> (+5.15%)	⬆️
...nt/qrm-plugins/memory/dynamicpolicy/state/state.go	63.63% <ø> (-2.31%)	⬇️
...ins/memory/dynamicpolicy/state/state_checkpoint.go	48.05% <ø> (ø)
...rm-plugins/memory/dynamicpolicy/state/state_mem.go	74.76% <ø> (+0.79%)	⬆️
... and 197 more

... and 42 files with indirect coverage changes

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