basalt-26.3: roachtest: backup/import-rollback failed

roachtest.backup/import-rollback [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_GreenRoachtestNightlyGcePrivateBasaltBazel/21495809?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_GreenRoachtestNightlyGcePrivateBasaltBazel/21495809?buildTab=artifacts#/backup/import-rollback) on basalt-26.3 @ [5ea90edd30305b19395123de8c1245c94cf163c6](https://github.com/cockroachdb/cockroach/commits/5ea90edd30305b19395123de8c1245c94cf163c6):

Failed with:

```
(test_runner.go:1631).runTest: test timed out (4h0m0s)
test artifacts and logs in: /artifacts/backup/import-rollback/run_1
```
Cluster Node to Ip Mapping:
| Node | Public IP | Private IP |
| --- | --- | --- |
| teamcity-21495809-1788330657-36-n3cpu8-0001 | | 10.91.99.198 |
| teamcity-21495809-1788330657-36-n3cpu8-0002 | | 10.91.99.196 |
| teamcity-21495809-1788330657-36-n3cpu8-0003 | | 10.91.99.197 |

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=8
- diskCount=0
- encrypted=true
- fs=ext4
- localSSD=true
- metamorphicLeases=default
- runtimeAssertionsBuild=false
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-21495809/backup-import-rollback/1788331767663/1788346398381)

_Logs were not uploaded to Datadog_

/cc @cockroachlabs/disaster-recovery

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

Start with the /artifacts/backup/import-rollback/run_1 logs and the timeout at test_runner.go:1631, then read the roachtest README and inspect the linked Grafana run. Determine why backup/import-rollback timed out on GCE and leave the test completing successfully with evidence from a passing run.

Written by the indexing model from the issue text.