Merge bitcoin/bitcoin#31635: test: add coverage for unknown address type for createwalletdescriptor

4da7bfd test: add coverage for unknown address type for `createwalletdescriptor` (brunoerg)

Pull request description:

  Calling `createwalletdescriptor` RPC with an unknown address type throws an error. This PR adds test coverage for it as done for other RPCs (`getnewaddress `, `getrawchangeaddress`, etc).

ACKs for top commit:
  maflcko:
    lgtm ACK 4da7bfd
  rkrux:
    tACK 4da7bfd

Tree-SHA512: 490bc3ffeb70b0f26db0a44d3950d7410fef35d4056487f2e82c081fb14ca277a18943c487235e0163a29f90fc741a262c29835beb9f41936affa4e73ddad25f

Author: fanquake

test/functional/wallet_address_types.py

@@ -369,6 +369,8 @@ def run_test(self):
         assert_raises_rpc_error(-5, "Unknown address type ''", self.nodes[3].getnewaddress, None, '')
         assert_raises_rpc_error(-5, "Unknown address type ''", self.nodes[3].getrawchangeaddress, '')
         assert_raises_rpc_error(-5, "Unknown address type 'bech23'", self.nodes[3].getrawchangeaddress, 'bech23')
+        if self.options.descriptors:
+            assert_raises_rpc_error(-5, "Unknown address type 'bech23'", self.nodes[3].createwalletdescriptor, "bech23")
 
         self.log.info("Nodes with changetype=p2sh-segwit never use a P2WPKH change output")
         self.test_change_output_type(4, [to_address_bech32_1], 'p2sh-segwit')