mgr/dashboard: increase timeout to detect replication user in the secondary cluster

mgr/dashboard: increase timeout to detect replication user in the secondary cluster

Increase timeout to detect replication user in the secondary cluster in rgw multisite automation wizard. Currently its set to 2 mins, increase it to 5 minutes.
when you import realm token to the secondary cluster, we wait for the replication/system user we created in the primary cluster to be present in the secondary cluster and when we find that user we set the credentials in the secondary cluster using ceph dashboard set-rgw-crdentials . The timeout for this is set to 2 minutes and sometimes it takes more than 2 minutes for the user to be replicated in the secondary cluster

Fixes: https://tracker.ceph.com/issues/68384
Signed-off-by: Aashish Sharma <aasharma@redhat.com>