Remember all tablets in VTOrc

[GuptaManan100]

Description

This PR fixes the issue described in #16887. VTOrc now remembers all the tablets in its state, even if they aren't of a replica type. We just ensure not to run any repairs on them. This ensures that all the shard metrics that VTOrc publishes like ErrantGTIDTabletCount are correct since it is seeing the full picture and not a part of it.

Related Issue(s)

• Fixes Bug Report: If VTOrc is configured to convert tablets with errant gtids to drained type, it soon forgets them #16887

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]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.42%. Comparing base (eab262e) to head (79083d5).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16888      +/-   ##
==========================================
- Coverage   69.42%   69.42%   -0.01%     
==========================================
  Files        1571     1571              
  Lines      203276   203276              
==========================================
- Hits       141125   141121       -4     
- Misses      62151    62155       +4     

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