release-26.3: roachtest: backup-restore/round-trip 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/round-trip [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21444499?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21444499?buildTab=artifacts#/backup-restore/round-trip) on release-26.3 @ [6dd9cc93fcd4557b76eeded2bfc5253f0bcc69c0](https://github.com/cockroachdb/cockroach/commits/6dd9cc93fcd4557b76eeded2bfc5253f0bcc69c0):

Failed with:

```
(test_runner.go:1579).runTest: test timed out (4h0m0s)
test artifacts and logs in: /artifacts/backup-restore/round-trip/run_1
```
Cluster Node to Ip Mapping:
| Node | Public IP | Private IP |
| --- | --- | --- |
| teamcity-21444499-1785303493-17-n4cpu4-0001 | 35.231.163.73 | 10.142.2.43 |
| teamcity-21444499-1785303493-17-n4cpu4-0002 | 34.24.229.66 | 10.142.0.75 |
| teamcity-21444499-1785303493-17-n4cpu4-0003 | 35.237.216.208 | 10.142.2.44 |
| teamcity-21444499-1785303493-17-n4cpu4-0004 | 35.196.224.254 | 10.142.2.149 |

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- encrypted=false
- fs=ext4
- localSSD=true
- metamorphicWriteBuffering=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-21444499/backup-restore-round-trip/1785304562293/1785319137936)

See: [Datadog Logs](https://us5.datadoghq.com/logs?query=service%3Aroachtest+%40cluster%3Ateamcity-21444499-1785303493-17-n4cpu4&from_ts=1785304562293&to_ts=1785319137936&live=false&storage=flex_tier)

Same failure on other branches

- #170522 roachtest: backup-restore/round-trip failed [A-disaster-recovery B-runtime-assertions-enabled C-test-failure O-roachtest O-robot T-disaster-recovery branch-release-26.1]

/cc @cockroachlabs/disaster-recovery

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

Jira issue: CRDB-66195