roachtest: backup-restore/online-restore failed

**Note:** This build has runtime assertions enabled. If the same failure was hit in a run without assertions enabled, there should be a similar failure without this message. If there isn't one, then this failure is likely due to an assertion violation or (assertion) timeout.

roachtest.backup-restore/online-restore [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21513554?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21513554?buildTab=artifacts#/backup-restore/online-restore) on master @ [2bf53f5e2960d67b69a8d3576c03e3e9fc3dae2a](https://github.com/cockroachdb/cockroach/commits/2bf53f5e2960d67b69a8d3576c03e3e9fc3dae2a):

Failed with:

```
(test_runner.go:2023).runTest: test timed out (4h0m0s)
test artifacts and logs in: /artifacts/backup-restore/online-restore/run_1
```
Cluster Node to Ip Mapping:
| Node | Public IP | Private IP |
| --- | --- | --- |
| teamcity-21513554-1789192452-16-n4cpu4-0001 | | 10.91.98.120 |
| teamcity-21513554-1789192452-16-n4cpu4-0002 | | 10.91.98.119 |
| teamcity-21513554-1789192452-16-n4cpu4-0003 | | 10.91.98.121 |
| teamcity-21513554-1789192452-16-n4cpu4-0004 | | 10.91.97.3 |

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- encrypted=true
- fs=ext4
- localSSD=true
- metamorphicDRPC=true
- runtimeAssertionsBuild=true
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)

See: [Grafana](https://go.crdb.dev/roachtest-grafana/teamcity-21513554/backup-restore-online-restore/1789192849246/1789207513894)

See: [Datadog Logs](https://us5.datadoghq.com/logs?query=service%3Aroachtest+%40cluster%3Ateamcity-21513554-1789192452-16-n4cpu4&from_ts=1789192849246&to_ts=1789207513894&live=false&storage=flex_tier)

Same failure on other branches

- #175142 basalt-26.3: roachtest: backup-restore/online-restore failed [A-disaster-recovery B-runtime-assertions-enabled C-test-failure O-roachtest O-robot T-disaster-recovery basalt-green branch-basalt-26.3 release-blocker]

/cc @cockroachlabs/disaster-recovery

[Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-68319

Start with the roachtest README and the TeamCity build and artifacts for backup-restore/online-restore, especially /artifacts/backup-restore/online-restore/run_1. Compare the timeout and logs with issue #175142 and inspect the disaster-recovery roachtest entry point. Done means identifying the cause of the four-hour timeout and restoring a passing online-restore run without masking assertion failures.

Written by the indexing model from the issue text.