test: refactor: return TaprootInfo from P2TR address creation routine

Rather than only returning the internal key from the P2TR anyone-can-spend
address creation routine, provide the whole TaprootInfo object, which in turn
contains a dictionary of TaprootLeafInfo object for named leaves.

This data is used in MiniWallet for the default ADDRESS_OP_TRUE mode, in order
to deduplicate the witness script and leaf version of the control block.

test/functional/test_framework/wallet.py

@@ -39,7 +39,6 @@ from test_framework.messages import (
 )
 from test_framework.script import (
     CScript,
-    LEAF_VERSION_TAPSCRIPT,
     OP_1,
     OP_NOP,
     OP_RETURN,
@@ -107,7 +106,7 @@ class MiniWallet:
             self._scriptPubKey = key_to_p2pk_script(pub_key.get_bytes())
         elif mode == MiniWalletMode.ADDRESS_OP_TRUE:
             internal_key = None if tag_name is None else hash256(tag_name.encode())
-            self._address, self._internal_key = create_deterministic_address_bcrt1_p2tr_op_true(internal_key)
+            self._address, self._taproot_info = create_deterministic_address_bcrt1_p2tr_op_true(internal_key)
             self._scriptPubKey = address_to_scriptpubkey(self._address)
 
         # When the pre-mined test framework chain is used, it contains coinbase
@@ -195,7 +194,12 @@ class MiniWallet:
         elif self._mode == MiniWalletMode.ADDRESS_OP_TRUE:
             tx.wit.vtxinwit = [CTxInWitness()] * len(tx.vin)
             for i in tx.wit.vtxinwit:
-                i.scriptWitness.stack = [CScript([OP_TRUE]), bytes([LEAF_VERSION_TAPSCRIPT]) + self._internal_key]
+                assert_equal(len(self._taproot_info.leaves), 1)
+                leaf_info = list(self._taproot_info.leaves.values())[0]
+                i.scriptWitness.stack = [
+                    leaf_info.script,
+                    bytes([leaf_info.version]) + self._taproot_info.internal_pubkey,
+                ]
         else:
             assert False