In this commit we extend the timeout error message with
additional context - if we see that there is no quorum of
available nodes, we report this as the most likely
cause of the error.
We adjust the test by adding this new information to the
expected_error. We need raft-group-registry-fd-threshold-in-ms
to make _direct_fd threshold less than
group0-raft-op-timeout-in-ms.
99419d5964