Debug auto_replace_001_pos failures

Reduced the timeout to 60 seconds which should be more than
sufficient and allow the test to be marked as FAILED rather
than KILLED.  Also dump the pool status on cleanup.

Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #14829

tests/zfs-tests/include/libtest.shlib

@@ -1951,6 +1951,7 @@ function check_pool_status # pool token keyword <verbose>
 #	is_pool_removing - to check if the pool removing is a vdev
 #	is_pool_removed - to check if the pool remove is completed
 #	is_pool_discarding - to check if the pool checkpoint is being discarded
+#	is_pool_replacing - to check if the pool is performing a replacement
 #
 function is_pool_resilvering #pool <verbose>
 {
@@ -1997,6 +1998,10 @@ function is_pool_discarding #pool
 {
 	check_pool_status "$1" "checkpoint" "discarding"
 }
+function is_pool_replacing #pool
+{
+	zpool status "$1" | grep -qE 'replacing-[0-9]+'
+}
 
 function wait_for_degraded
 {
@@ -2983,12 +2988,15 @@ function wait_freeing #pool
 # Wait for every device replace operation to complete
 #
 # $1 pool name
+# $2 timeout
 #
-function wait_replacing #pool
+function wait_replacing #pool timeout
 {
+	typeset timeout=${2:-300}
 	typeset pool=${1:-$TESTPOOL}
-	while zpool status $pool | grep -qE 'replacing-[0-9]+'; do
-		log_must sleep 1
+	for (( timer = 0; timer < $timeout; timer++ )); do
+		is_pool_replacing $pool || break;
+		sleep 1;
 	done
 }