basalt-26.3: roachtest: backup/ceph/squid/plain failed

roachtest.backup/ceph/squid/plain [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21508690?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyGcePrivateBazel/21508690?buildTab=artifacts#/backup/ceph/squid/plain) on basalt-26.3 @ [edc226e9d007d4a208c831af595863f67e923ebe](https://github.com/cockroachdb/cockroach/commits/edc226e9d007d4a208c831af595863f67e923ebe):

Failed with:

```
(cluster.go:4355).Run: full command output in run_062443.173367665_n4_tmpcephInitsh.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/backup/ceph/squid/plain/cpu_arch=fips/run_1
```
Cluster Node to Ip Mapping:
| Node | Public IP | Private IP |
| --- | --- | --- |
| teamcity-21508690-1789019778-09-n4cpu4-0001 | | 10.91.98.147 |
| teamcity-21508690-1789019778-09-n4cpu4-0002 | | 10.91.98.145 |
| teamcity-21508690-1789019778-09-n4cpu4-0003 | | 10.91.98.146 |
| teamcity-21508690-1789019778-09-n4cpu4-0004 | | 10.91.98.178 |

Parameters:
- arch=fips
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- encrypted=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-21508690/backup-ceph-squid-plain/1789021440883/1789021717261)

_Logs were not uploaded to Datadog_

Same failure on other branches

- #172194 release-26.3: roachtest: backup/ceph/squid/plain failed [B-runtime-assertions-enabled C-test-failure O-roachtest O-robot T-field-eng branch-release-26.3]
- #171086 roachtest: backup/ceph/squid/plain failed [B-runtime-assertions-enabled C-test-failure O-roachtest O-robot T-field-eng branch-release-25.4.11-rc]
- #169618 roachtest: backup/ceph/squid/plain failed [C-test-failure O-roachtest O-robot T-field-eng branch-master]
- #169608 roachtest: backup/ceph/squid/plain failed [C-test-failure O-roachtest O-robot T-field-eng branch-release-25.4.10-rc]
- #169601 roachtest: backup/ceph/squid/plain failed [C-test-failure O-roachtest O-robot T-field-eng branch-release-25.2]
- #167201 release-26.2: roachtest: backup/ceph/squid/plain failed [C-test-failure O-roachtest O-robot T-field-eng branch-release-26.2]
- #167089 roachtest: backup/ceph/squid/plain failed [B-runtime-assertions-enabled C-test-failure O-roachtest O-robot T-field-eng branch-release-25.4]
- #166253 roachtest: backup/ceph/squid/plain failed [C-test-failure O-roachtest O-robot T-field-eng branch-release-26.1]

/cc @cockroachlabs/field-engineering

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

Jira issue: CRDB-68140

Start with the linked TeamCity build and its artifacts, especially the log named `run_062443.173367665_n4_tmpcephInitsh.log`; the issue does not identify a source file or test entry point. Compare the listed failures on other branches to determine whether this is a recurring problem. Done means identifying and addressing the cause of the `backup/ceph/squid/plain` roachtest failure.

Written by the indexing model from the issue text.