metrics(sysadvisor) - power aware advisor emits metrics of essential ops

[h-w-chen]

What type of PR is this?

Enhancements

What this PR does / why we need it:

it has 2 parts:

• power ware advisor emits metrics for significant events, which will be used by grafana panels;
• dvfs tracker does not count the power reduction effect while no power capper(client from qrm plugins) connected.

[codecov]

Codecov Report

Attention: Patch coverage is 79.16667% with 30 lines in your changes missing coverage. Please review.

Project coverage is 56.97%. Comparing base (54f457d) to head (c774d9a).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
...nt/sysadvisor/plugin/poweraware/advisor/advisor.go	42.85%	8 Missing ⚠️
...advisor/plugin/poweraware/capper/server/service.go	50.00%	7 Missing ⚠️
...sysadvisor/plugin/poweraware/capper/instruction.go	73.91%	4 Missing and 2 partials ⚠️
...or/plugin/poweraware/evictor/percentage_evictor.go	40.00%	3 Missing ⚠️
...gent/sysadvisor/plugin/poweraware/capper/capper.go	0.00%	2 Missing ⚠️
...n/poweraware/evictor/percentage_evictor_metrics.go	50.00%	2 Missing ⚠️
...kg/agent/sysadvisor/plugin/poweraware/spec/spec.go	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #759      +/-   ##
==========================================
+ Coverage   56.67%   56.97%   +0.30%     
==========================================
  Files         601      606       +5     
  Lines       69841    69942     +101     
==========================================
+ Hits        39580    39851     +271     
+ Misses      26007    25821     -186     
- Partials     4254     4270      +16     

Flag	Coverage Δ
unittest	56.97% <79.16%> (+0.30%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.