pd: support router micro service in tidb-operator

[bufferflies]

ref:#6684
manual test with us.gcr.io/pingcap-public/tidbx/pd:master-next-gen

[ti-chi-bot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[pingcap-cla-assistant]

All committers have signed the CLA.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0.44313% with 674 lines in your changes missing coverage. Please review.
✅ Project coverage is 37.19%. Comparing base (44edb93) to head (c278db9).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6683      +/-   ##
==========================================
- Coverage   38.34%   37.19%   -1.16%     
==========================================
  Files         373      389      +16     
  Lines       21630    22307     +677     
==========================================
+ Hits         8294     8297       +3     
- Misses      13336    14010     +674     

Flag	Coverage Δ
unittest	37.19% <0.44%> (-1.16%)	⬇️

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[bufferflies]

/test all

[liubog2008]

/lgtm

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2026-02-02 01:52:54.676669678 +0000 UTC m=+59045.778068397: ☑️ agreed by liubog2008.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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[ti-chi-bot]

@bufferflies: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-e2e	c278db9	link	unknown	/test pull-e2e

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