tiup cluster support router service mcs

[bufferflies]

What problem does this PR solve?

close #xxx

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

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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[pingcap-cla-assistant]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 36.29%. Comparing base (9338c69) to head (7650525).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2636      +/-   ##
==========================================
- Coverage   39.08%   36.29%   -2.79%     
==========================================
  Files         356      328      -28     
  Lines       37022    35600    -1422     
==========================================
- Hits        14468    12918    -1550     
- Misses      20746    20858     +112     
- Partials     1808     1824      +16     

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[bufferflies]

/ping @rleungx