Add Unresolved Transactions command in vtctld service

[harshit-gangal]

Description

This PR adds support for vtcld server and vtctld client to provide unresolved distributed transactions list.

Related Issue(s)

• RFC: Atomic Distributed Transactions #16245

Checklist

• 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

[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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• Protobuf changes should be wire-compatible.
• Changes to _vt tables and RPCs need to be backward compatible.
• RPC changes should be compatible with vitess-operator
• If a flag is removed, then it should also be removed from vitess-operator and arewefastyet, if used there.
• vtctl command output order should be stable and awk-able.

[codecov]

Codecov Report

Attention: Patch coverage is 67.34694% with 32 lines in your changes missing coverage. Please review.

Project coverage is 68.93%. Comparing base (773a216) to head (e20b98a).
Report is 17 commits behind head on main.

Files with missing lines	Patch %	Lines
go/cmd/vtctldclient/command/query.go	6.66%	14 Missing ⚠️
go/vt/vtctl/grpcvtctldclient/client_gen.go	0.00%	4 Missing ⚠️
go/vt/vtctl/grpcvtctldserver/server.go	86.66%	4 Missing ⚠️
go/vt/vtcombo/tablet_map.go	0.00%	2 Missing ⚠️
go/vt/vtctl/localvtctldclient/client_gen.go	0.00%	2 Missing ⚠️
go/vt/vttablet/faketmclient/fake_client.go	0.00%	2 Missing ⚠️
...t/vtctl/grpcvtctldserver/testutil/test_tmclient.go	75.00%	1 Missing ⚠️
go/vt/vttablet/grpctmclient/client.go	90.00%	1 Missing ⚠️
go/vt/vttablet/grpctmserver/server.go	85.71%	1 Missing ⚠️
go/vt/vttablet/tabletmanager/rpc_query.go	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16679      +/-   ##
==========================================
+ Coverage   68.92%   68.93%   +0.01%     
==========================================
  Files        1562     1565       +3     
  Lines      200941   201627     +686     
==========================================
+ Hits       138497   138994     +497     
- Misses      62444    62633     +189     

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[GuptaManan100]

Looks good to me!

[shlomi-noach]

I guess using shard here is now safe with go1.23. I'm still wary of this!

[harshit-gangal]

It was introduced in go1.21 as an experiment, and default use in go1.22