Multiple changes on Distributed Transaction user apis

[harshit-gangal]

Description

This PR have mixed changes on distributed transaction.

1. Added abandon age to Unresolved Transactions API. Lists all the unresolved transactions older than the specified age. If not provided, then vttablet default will be used.
2. Conclude command can work without providing participant list. If not provided, the vtctld service will invoke ReadTransaction api to read the transaction metadata to know all the participants in the transaction.
3. For UX, vtctld command Conclude does not take participants list, only the grpc service have that option.
4. Modified vtctld command to be flag based. New command

DistributedTransaction unresolved-list --keyspace <keyspace> --abandon-age <abandon_age_seconds>
DistributedTransaction conclude --dtid <dtid>

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

Deployment Notes

[vitess-bot]

Review Checklist

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General

• Ensure that the Pull Request has a descriptive title.
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Tests

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• vtctl command output order should be stable and awk-able.

[codecov]

Codecov Report

Attention: Patch coverage is 80.39216% with 20 lines in your changes missing coverage. Please review.

Project coverage is 69.53%. Comparing base (9563fcb) to head (f708ce8).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
go/cmd/vtctldclient/command/transactions.go	37.50%	5 Missing ⚠️
go/vt/vtcombo/tablet_map.go	0.00%	4 Missing ⚠️
go/vt/vttablet/tabletmanager/rpc_transaction.go	85.00%	3 Missing ⚠️
go/vt/vttablet/faketmclient/fake_client.go	0.00%	2 Missing ⚠️
go/vt/vttablet/tabletserver/tabletserver.go	0.00%	2 Missing ⚠️
...t/vtctl/grpcvtctldserver/testutil/test_tmclient.go	83.33%	1 Missing ⚠️
go/vt/vtgate/tx_conn.go	50.00%	1 Missing ⚠️
go/vt/vttablet/grpctmclient/client.go	90.90%	1 Missing ⚠️
go/vt/vttablet/grpctmserver/server.go	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16788      +/-   ##
==========================================
+ Coverage   69.52%   69.53%   +0.01%     
==========================================
  Files        1568     1569       +1     
  Lines      202442   202492      +50     
==========================================
+ Hits       140741   140804      +63     
+ Misses      61701    61688      -13     

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[GuptaManan100]

LGTM!