refactor(mcs): remove global service registration

[JmPotato]

What problem does this PR solve?

Issue Number: ref #9707.

What is changed and how does it work?

This change removes the global `ServerServiceRegistry` and the auto-registration `install` packages for microservices, as they are no longer used.

Check List

Tests

• Unit test
• Integration test

Release note

None.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.79%. Comparing base (9b4433d) to head (d882784).
⚠️ Report is 1 commits behind head on master.

❌ Your patch status has failed because the patch coverage (0.00%) is below the target coverage (74.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9718      +/-   ##
==========================================
- Coverage   76.79%   76.79%   -0.01%     
==========================================
  Files         483      482       -1     
  Lines       76722    76715       -7     
==========================================
- Hits        58921    58912       -9     
+ Misses      14214    14210       -4     
- Partials     3587     3593       +6     

Flag	Coverage Δ
unittests	76.79% <0.00%> (-0.01%)	⬇️

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[JmPotato]

/retest

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bufferflies, rleungx

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-09-03 12:27:14.779511845 +0000 UTC m=+9978.762609292: ☑️ agreed by bufferflies.
• 2025-09-04 02:59:35.959417885 +0000 UTC m=+62319.942515323: ☑️ agreed by rleungx.