exchange round and slowdown in cpu regulator

[sun-yuliang]

What type of PR is this?

Enhancements
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What this PR does / why we need it:

exchange round and slowdown procedure in cpu regulator to ignore trivial ramp down of float number

Which issue(s) this PR fixes:

#85

Special notes for your reviewer:

[codecov]

Codecov Report

Patch coverage: 53.05% and project coverage change: +1.48 🎉

Comparison is base (21d86d9) 51.30% compared to head (042c108) 52.79%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #99      +/-   ##
==========================================
+ Coverage   51.30%   52.79%   +1.48%     
==========================================
  Files         318      354      +36     
  Lines       32418    34557    +2139     
==========================================
+ Hits        16632    18244    +1612     
- Misses      13840    14178     +338     
- Partials     1946     2135     +189     

Flag	Coverage Δ
unittest	52.79% <53.05%> (+1.48%)	⬆️

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

Impacted Files	Coverage Δ
pkg/agent/evictionmanager/endpoint/endpoint.go	0.00% <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	43.73% <ø> (+5.38%)	⬆️
...ins/memory/dynamicpolicy/state/state_checkpoint.go	48.05% <0.00%> (ø)
...ourcemanager/fetcher/kubelet/topology/interface.go	0.00% <0.00%> (ø)
.../agent/resourcemanager/reporter/cnr/cnrreporter.go	61.20% <ø> (-3.06%)	⬇️
pkg/agent/resourcemanager/reporter/converter.go	33.33% <ø> (ø)
pkg/agent/resourcemanager/reporter/manager.go	51.37% <ø> (-6.38%)	⬇️
pkg/agent/resourcemanager/reporter/reporter.go	55.55% <ø> (ø)
... and 133 more

... and 15 files with indirect coverage changes

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[cheney-lin]

What are the benefits of this pr?

[sun-yuliang]

What are the benefits of this pr?

Under former logic, it's common that cpu requirement float number decreases a bit, i.e. same after ceil to even number, but triggers ramp down period update, resulting in ramp down too slow in some cases. After this exchange, this issue is solved.