[Cherry-pick][release-1.12]Fix node-agent metrics missing

[allenxu404]

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Does your change fix a particular issue?

Fixes #7014，#6792

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• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (32a8bbb) 60.58% compared to head (06e3773) 60.58%.

Files	Patch %	Lines
pkg/cmd/cli/nodeagent/server.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.12    #7098      +/-   ##
================================================
- Coverage         60.58%   60.58%   -0.01%     
================================================
  Files               247      247              
  Lines             26496    26499       +3     
================================================
+ Hits              16053    16054       +1     
- Misses             9317     9319       +2     
  Partials           1126     1126              

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