fix TiCDC across K8s address (#5060)

[ti-chi-bot]

This is an automated cherry-pick of #5060

What problem does this PR solve?

fix bug introduced in #5040

W0609 09:40:30.451678       1 ticdc_member_manager.go:268] Failed to get status for Pod tc-1-ticdc-0 of [ns-1/tc-1], error: Get "http://tc-1-ticdc-0.tc-1-ticdc-peer.ns-1.cluster.local:8301/status": dial tcp: lookup tc-1-ticdc-0.tc-1-ticdc-peer.ns-1.cluster.local on 10.234.0.10:53: no such host

What is changed and how does it work?

Code changes

• Has Go code change
• Has CI related scripts change

Tests

• Unit test
• E2E test
• Manual test
• No code

Side effects

• Breaking backward compatibility
• Other side effects:

Related changes

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

Release Notes

Please refer to Release Notes Language Style Guide before writing the release note.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign wangle1321 for approval. For more information see the Kubernetes Code Review Process.

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

Needs approval from an approver in each of these files:

• OWNERS

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

[codecov-commenter]

Codecov Report

Merging #5062 (0b58b45) into release-1.5 (0dea819) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@               Coverage Diff               @@
##           release-1.5    #5062      +/-   ##
===============================================
+ Coverage        58.95%   58.97%   +0.01%     
===============================================
  Files              228      228              
  Lines            26513    26513              
===============================================
+ Hits             15631    15636       +5     
+ Misses            9347     9343       -4     
+ Partials          1535     1534       -1     

Flag	Coverage Δ
unittest	58.97% <100.00%> (+0.01%)	⬆️