Refactor the QRM plugin state

[luomingmeng]

What type of PR is this?

Enhancements

What this PR does / why we need it:

Refactor the QRM plugin state by extracting common fields from CPU and memory AllocationInfo into a unified AllocationMeta structure.

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

Attention: Patch coverage is 71.67756% with 130 lines in your changes missing coverage. Please review.

Project coverage is 56.94%. Comparing base (f6623f4) to head (8f8f24e).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/agent/qrm-plugins/commonstate/state.go	64.94%	17 Missing and 17 partials ⚠️
...ns/cpu/dynamicpolicy/policy_allocation_handlers.go	65.38%	21 Missing and 6 partials ⚠️
pkg/agent/qrm-plugins/commonstate/util.go	68.29%	11 Missing and 2 partials ⚠️
.../agent/qrm-plugins/cpu/dynamicpolicy/state/util.go	59.25%	8 Missing and 3 partials ⚠️
pkg/agent/qrm-plugins/cpu/dynamicpolicy/policy.go	56.52%	10 Missing ⚠️
...lugins/cpu/dynamicpolicy/policy_advisor_handler.go	71.42%	4 Missing and 4 partials ⚠️
...u/dynamicpolicy/validator/validator_cpu_advisor.go	53.84%	1 Missing and 5 partials ⚠️
pkg/agent/qrm-plugins/commonstate/pool.go	85.71%	3 Missing and 1 partial ⚠️
...qrm-plugins/cpu/dynamicpolicy/cpuadvisor/helper.go	66.66%	2 Missing and 1 partial ⚠️
...-plugins/cpu/dynamicpolicy/policy_async_handler.go	0.00%	2 Missing ⚠️
... and 9 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #702      +/-   ##
==========================================
- Coverage   57.14%   56.94%   -0.21%     
==========================================
  Files         568      570       +2     
  Lines       54981    54864     -117     
==========================================
- Hits        31419    31240     -179     
- Misses      19625    19694      +69     
+ Partials     3937     3930       -7     

Flag	Coverage Δ
unittest	56.94% <71.67%> (-0.21%)	⬇️

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