[srp-client] exclude non-preferred addresses in AutoAddress mode (#9642)

This commit updates the `AutoAddress` mode in `Srp::Client` to
exclude any deprecated (non-preferred) address when registering
host addresses.

It also updates `test_srp_auto_host_address` to validate the new
behavior.

tests/scripts/thread-cert/node.py

@@ -1880,8 +1880,8 @@ class NodeImpl:
         self.send_command(cmd)
         self._expect_done()
 
-    def get_addrs(self):
-        self.send_command('ipaddr')
+    def get_addrs(self, verbose=False):
+        self.send_command('ipaddr' + (' -v' if verbose else ''))
 
         return self._expect_results(r'\S+(:\S*)+')