fix memory leak for yur-tunnel-server

[huweihuang]

What type of PR is this?

/kind bug

What this PR does / why we need it:

There is a memory leak in the yurt-tunnel-server, consuming too much memory.

The reason is that there is a goroutine memory leak in the dependency apiserver-network-proxy

Which issue(s) this PR fixes:

Fixes # #1440

Special notes for your reviewer:

@rambohe-ch

[codecov]

Codecov Report

Merging #1471 (453c87a) into master (505c27a) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1471      +/-   ##
==========================================
- Coverage   50.74%   50.73%   -0.02%     
==========================================
  Files         131      131              
  Lines       15576    15576              
==========================================
- Hits         7904     7902       -2     
- Misses       6951     6952       +1     
- Partials      721      722       +1     

Flag	Coverage Δ
unittests	50.73% <ø> (-0.02%)	⬇️

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

see 1 file with indirect coverage changes

[rambohe-ch]

@huweihuang please fix verify ci errors. maybe you need execute command go mod tidy before git push.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[openyurt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: huweihuang, rambohe-ch

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• OWNERS [rambohe-ch]

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[rambohe-ch]

/lgtm

[rambohe-ch]

Fixes #1440

[rambohe-ch]

/backport release-v1.3

[github-actions]

Successfully created backport PR for release-v1.3:

• [Backport release-v1.3] fix memory leak for yur-tunnel-server #1493