support clear residual net class

[luomingmeng]

What type of PR is this?

Bug fixes

What this PR does / why we need it:

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

Attention: Patch coverage is 59.13978% with 38 lines in your changes missing coverage. Please review.

Project coverage is 56.92%. Comparing base (7d9189e) to head (78f44b5).

Files	Patch %	Lines
...g/agent/qrm-plugins/network/staticpolicy/policy.go	52.83%	17 Missing and 8 partials ⚠️
pkg/metaserver/external/cgroupid/manager.go	30.76%	9 Missing ⚠️
pkg/util/external/network/manager.go	92.00%	1 Missing and 1 partial ⚠️
pkg/util/external/network/manager_linux.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #666      +/-   ##
==========================================
+ Coverage   56.90%   56.92%   +0.01%     
==========================================
  Files         554      556       +2     
  Lines       53185    53257      +72     
==========================================
+ Hits        30265    30315      +50     
- Misses      19123    19130       +7     
- Partials     3797     3812      +15     

Flag	Coverage Δ
unittest	56.92% <59.13%> (+0.01%)	⬆️

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