multi-models in borwein

[csfldf]

1. support multi-models in borwein
2. add cpu usage ratio for pod and node custom metrics

[codecov]

Codecov Report

Attention: Patch coverage is 51.16279% with 126 lines in your changes missing coverage. Please review.

Project coverage is 57.10%. Comparing base (f6623f4) to head (320ae3b).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
...ce/models/borwein/inferencesvc/inference_svc.pb.go	8.82%	58 Missing and 4 partials ⚠️
...in/inference/modelresultfetcher/borwein/borwein.go	39.24%	38 Missing and 10 partials ⚠️
...in/trainingtpreg/training_throughput_regression.go	73.07%	5 Missing and 2 partials ⚠️
.../agent/metric/provisioner/malachite/provisioner.go	82.85%	4 Missing and 2 partials ⚠️
...tions/sysadvisor/qosaware/model/borwein/borwein.go	57.14%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #701      +/-   ##
==========================================
- Coverage   57.14%   57.10%   -0.04%     
==========================================
  Files         568      571       +3     
  Lines       54981    55205     +224     
==========================================
+ Hits        31419    31527     +108     
- Misses      19625    19718      +93     
- Partials     3937     3960      +23     

Flag	Coverage Δ
unittest	57.10% <51.16%> (-0.04%)	⬇️

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