roachprod: "unknown cluster" error in roachtest run

We observed the following error in a roachtest nightly run (#125412):

> ```(cluster.go:2344).Run: full command output in run_131044.751779665_n1_cockroach-debug-reco.log: unknown cluster: teamcity-15583873-1717998720-63-n6cpu4```

It's still unclear _how_ and _why_ the cluster information would not be available at the time of the error. In addition, in that same run, roachtest was subsequently able to delete the cluster after the failure, which is contradicting (or at least unexpected).

This issue is not currently actionable but we can use it to group together other occurrences of this error if they happen and hopefully at that point we'll have enough information to debug it further.

Jira issue: CRDB-39567