roachtest: live_migration_error failed

roachtest.live_migration_error [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAzureBazel/19807767?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAzureBazel/19807767?buildTab=artifacts#/allocbench/nodes=7/cpu=8/kv/r=50/ops=skew) on master @ [4f26eda2e687eea330e61f62f5dfc069070a65cd](https://github.com/cockroachdb/cockroach/commits/4f26eda2e687eea330e61f62f5dfc069070a65cd):

```
test allocbench/nodes=7/cpu=8/kv/r=50/ops=skew failed: VMs had live migrations during the test run: TEAMCITY-19807767-1748497267-17-N8CPU8-0008

**Other Failures:**
(test_runner.go:1400).runTest: test timed out (3h0m0s)
test artifacts and logs in: /artifacts/allocbench/nodes=7/cpu=8/kv/r=50/ops=skew/run_1
```

Parameters:
- arch=amd64
- cloud=azure
- coverageBuild=false
- cpu=8
- encrypted=false
- fs=ext4
- localSSD=true
- runtimeAssertionsBuild=false
- ssd=0
Help

See: [roachtest README](https://github.com/cockroachdb/cockroach/blob/master/pkg/cmd/roachtest/README.md)

See: [How To Investigate \(internal\)](https://cockroachlabs.atlassian.net/l/c/SSSBr8c7)

_Grafana is not yet available for azure clusters_

/cc @cockroachdb/test-eng

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

Jira issue: CRDB-51072