test: increase start timeout for mdadm arrays

On CentOS 10 starting an mdraid takes a while longer and times out.
Other tests have already increased the wait_timeout() for mdraids to
start.

Author: jelly

test/verify/check-storage-mdraid

@@ -303,7 +303,8 @@ class TestStorageMdRaid(storagelib.StorageCase):
         self.check_dropdown_action_disabled(self.card_row("MDRAID device", name=disk1), "Remove", "The MDRAID device must be running")
 
         self.raid_default_action("Start")
-        b.wait_text(self.card_desc("MDRAID device", "State"), "Running")
+        with b.wait_timeout(30):
+            b.wait_text(self.card_desc("MDRAID device", "State"), "Running")
 
         # With a running array, we can add spares, but not remove "in-sync" disks
         b.wait_not_present(self.card_button("MDRAID device", "Add disk") + ":disabled")