qa/tasks: capture CommandCrashedError when running nvme list cmd

qa/tasks: capture CommandCrashedError when running nvme list cmd

The safe_while retry loop does not catch exceptions, so a
CommandCrashedError from `nvme list` bypasses it entirely. Catch
CommandCrashedError and continue the retry loop instead.

Fixes: https://tracker.ceph.com/issues/77001 (Tentacle backport tracker)
Fixes: https://tracker.ceph.com/issues/76984 (original tracker)
Signed-off-by: Redouane Kachach <rkachach@ibm.com>
(cherry picked from commit 0bf55d6a8bb38942a33220ee6ab2890fb557476e)