[Direct PR] [release-21.0] Augment PrimaryStatus to also send Server UUID

[GuptaManan100]

Description

This PR makes the RPC changes that are required for #17031 to work as intended.

Related Issue(s)

• Part of Bug Report: Incorrect errant GTID detection because of how semi-sync replication works #17018

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

Review Checklist

Hello reviewers! 👋 Please follow this checklist when reviewing this Pull Request.

General

• Ensure that the Pull Request has a descriptive title.
• Ensure there is a link to an issue (except for internal cleanup and flaky test fixes), new features should have an RFC that documents use cases and test cases.

Tests

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Documentation

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Backward compatibility

• Protobuf changes should be wire-compatible.
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• vtctl command output order should be stable and awk-able.

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 67.22%. Comparing base (e6ec0ba) to head (6797545).
Report is 1 commits behind head on release-21.0.

Files with missing lines	Patch %	Lines
go/vt/mysqlctl/replication.go	77.77%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-21.0   #17032      +/-   ##
================================================
- Coverage         67.23%   67.22%   -0.02%     
================================================
  Files              1570     1570              
  Lines            251247   251256       +9     
================================================
- Hits             168938   168913      -25     
- Misses            82309    82343      +34     

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