basalt-26.3: crosscluster/logical/txnmode: TestTxnModeLWW failed

crosscluster/logical/txnmode.TestTxnModeLWW [failed](https://mesolite.cluster.engflow.com/invocations/default/3972bad9-cd6a-4d0d-96fe-e830383525c5?testReportRun=1&testReportShard=3&testReportAttempt=1#targets-Ly9wa2cvY3Jvc3NjbHVzdGVyL2xvZ2ljYWwvdHhubW9kZTp0eG5tb2RlX3Rlc3Q=) on basalt-26.3 @ [56cb5d5d608e6e57059d3a85dfd948cc917c4a17](https://github.com/cockroachdb/cockroach/commits/56cb5d5d608e6e57059d3a85dfd948cc917c4a17):

```
=== RUN TestTxnModeLWW
test_log_scope.go:172: test logs captured to: outputs.zip/logTestTxnModeLWW3713448922
test_log_scope.go:82: use -show-logs to present logs inline
test_server_shim.go:168: automatically injected a shared process virtual cluster under test; see comment at top of test_server_shim.go for details.
=== RUN TestTxnModeLWW/transactional
```

Parameters:
- attempt=1
- race=true
- run=1
- shard=3
Help

See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM)

/cc @cockroachlabs/cdc

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*TestTxnModeLWW.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-67656

Start with crosscluster/logical/txnmode.TestTxnModeLWW and reproduce the failure using the linked report's parameters: attempt=1, race=true, run=1, and shard=3. Inspect the captured logs referenced by test_log_scope.go and the shared process virtual-cluster context in test_server_shim.go; done means identifying the failure cause and getting the test to pass.

Written by the indexing model from the issue text.