Fix dual port nic parent label not right

[cyclinder]

Thanks for contributing!

Notice:

• unite test or E2E test
• do not forget essential code comment and log
• document for the PR
• release note label
  "release/none"
  "release/bug"
  "release/feature"
• read about Contribution notice: https://spidernet-io.github.io/spiderpool/latest/develop/contributing/

What issue(s) does this PR fix:

Fixes #

Special notes for your reviewer:

Release note:

[codecov]

Codecov Report

❌ Patch coverage is 68.75000% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.41%. Comparing base (7908e9a) to head (f798169).
⚠️ Report is 1 commits behind head on release-v1.1.

Files with missing lines	Patch %	Lines
pkg/rdmametrics/metrics.go	68.75%	5 Missing and 5 partials ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-v1.1    #5327      +/-   ##
================================================
+ Coverage         78.44%   79.41%   +0.96%     
================================================
  Files                56       56              
  Lines              6546     5290    -1256     
================================================
- Hits               5135     4201     -934     
+ Misses             1187      858     -329     
- Partials            224      231       +7     

Flag	Coverage Δ
unittests	79.41% <68.75%> (+0.96%)	⬆️

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Files with missing lines	Coverage Δ
pkg/rdmametrics/metrics.go	76.45% <68.75%> (+1.66%)	⬆️

... and 53 files with indirect coverage changes

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