release-26.2: roachtest: backup/ceph/squid/plain failed

roachtest.backup/ceph/squid/plain [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21292773?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21292773?buildTab=artifacts#/backup/ceph/squid/plain) on release-26.2 @ [0782535a3a01c766e055401e7c7994a63df7c8fc](https://github.com/cockroachdb/cockroach/commits/0782535a3a01c766e055401e7c7994a63df7c8fc):

Failed with:

```
(cluster.go:2533).Run: full command output in run_084304.482958426_n4_sudo-snap-install-mi.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/backup/ceph/squid/plain/run_1
```
Cluster Node to Ip Mapping:
| Node | Public IP | Private IP |
| --- | --- | --- |
| teamcity-21292773-1775024626-48-n4cpu4-0001 | 34.26.108.204 | 10.142.2.220 |
| teamcity-21292773-1775024626-48-n4cpu4-0002 | 34.75.4.200 | 10.142.2.239 |
| teamcity-21292773-1775024626-48-n4cpu4-0003 | 34.24.230.213 | 10.142.3.0 |
| teamcity-21292773-1775024626-48-n4cpu4-0004 | 35.237.207.8 | 10.142.0.28 |

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- diskCount=0
- encrypted=false
- 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-21292773/backup-ceph-squid-plain/1775032961737/1775033335601)

/cc @cockroachdb/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-62295

Start with the referenced run_084304.482958426_n4_sudo-snap-install-mi.log and artifacts under /artifacts/backup/ceph/squid/plain/run_1. Read pkg/cmd/roachtest/README.md and the linked Grafana view to trace the failure in the backup/ceph/squid/plain test. Done means the cause is addressed and this roachtest passes on release-26.2.

Written by the indexing model from the issue text.