Fix the zfsd_fault_001_pos test

Due to a regression in ZFS, a pool's status may not change to DEGRADED
promptly after a vdev becomes faulted. This test is primarily concerned
with vdev status, not pool status, so work around the bug by doing a
"zpool reopen". Otherwise the test would time out waiting for a status
change that never came.

MFC to stable/14 only.

https://github.com/openzfs/zfs/issues/16245

MFC after: 2 weeks
Sponsored by: ConnectWise