roachtest: more informatively tear down after timeout #45887
Merged
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When a test times out and fails to respond to cancellation, we already
dump the roachtest stacks (=test side of the hang).
With this commit, we additionally dump stacks for any processes
running on remote machines (=server side of the hang).
Additionally, this might improve our odds at actually nudging the test
to terminate than we did previously. (Though the context cancellation
ought to also have killed all processes).
Release justification: roachtest change only
Release note: None