cluster: fix tidb-dashboard listen_host

[nexustar]

What problem does this PR solve?

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (2eaf957) 55.39% compared to head (b5e90b7) 55.51%.

❗ Current head b5e90b7 differs from pull request most recent head 466b1a1. Consider uploading reports for the commit 466b1a1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2304      +/-   ##
==========================================
+ Coverage   55.39%   55.51%   +0.12%     
==========================================
  Files         325      325              
  Lines       34705    34706       +1     
==========================================
+ Hits        19222    19265      +43     
+ Misses      13184    13140      -44     
- Partials     2299     2301       +2     

Flag	Coverage Δ
cluster	44.85% <0.00%> (+0.16%)	⬆️
dm	25.48% <0.00%> (+<0.01%)	⬆️
playground	15.27% <0.00%> (-0.01%)	⬇️
tiup	15.56% <0.00%> (-<0.01%)	⬇️
unittest	22.33% <0.00%> (-<0.01%)	⬇️

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

Files	Coverage Δ
pkg/cluster/template/scripts/dashboard.go	0.00% <ø> (ø)
pkg/cluster/spec/dashboard.go	8.73% <0.00%> (-0.07%)	⬇️

... and 9 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[kaaaaaaang]

/lgtm

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-08 09:57:08.880607825 +0000 UTC m=+3638226.467717969: ☑️ agreed by kaaaaaaang.

[kaaaaaaang]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kaaaaaaang

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [kaaaaaaang]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment