add metrics for eviction and handlers

[waynepeking348]

What type of PR is this?

enhancements

What this PR does / why we need it:

add more metrics and tags for eviction and qrm logic

[codecov]

Codecov Report

Attention: 58 lines in your changes are missing coverage. Please review.

Comparison is base (01c79af) 53.40% compared to head (b137e6c) 53.36%.
Report is 1 commits behind head on main.

❗ Current head b137e6c differs from pull request most recent head 4a4d57d. Consider uploading reports for the commit 4a4d57d to get more accurate results

Files	Patch %	Lines
pkg/util/asyncworker/helpers.go	46.66%	12 Missing and 4 partials ⚠️
...m-plugins/memory/handlers/sockmem/sockmem_linux.go	23.07%	10 Missing ⚠️
...m-plugins/memory/dynamicpolicy/util_linux_amd64.go	0.00%	8 Missing ⚠️
pkg/util/cgroup/manager/cgroup.go	0.00%	8 Missing ⚠️
pkg/agent/evictionmanager/podkiller/podkiller.go	0.00%	5 Missing ⚠️
pkg/agent/evictionmanager/podkiller/killer.go	75.00%	4 Missing ⚠️
...plugin/qosaware/resource/cpu/region/region_base.go	0.00%	3 Missing and 1 partial ⚠️
pkg/util/asyncworker/async_workers.go	81.81%	2 Missing ⚠️
pkg/agent/qrm-plugins/util/util.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #382      +/-   ##
==========================================
- Coverage   53.40%   53.36%   -0.05%     
==========================================
  Files         439      439              
  Lines       48366    48423      +57     
==========================================
+ Hits        25830    25839       +9     
- Misses      19606    19653      +47     
- Partials     2930     2931       +1     

Flag	Coverage Δ
unittest	53.36% <41.41%> (-0.05%)	⬇️

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