Merge bitcoin/bitcoin#32452: test: Remove legacy wallet RPC overloads

b104d44227 test: Remove RPCOverloadWrapper (Ava Chow)
4d32c19516 test: Replace importpubkey (Ava Chow)
fe838dd391 test: Replace usage of addmultisigaddress (Ava Chow)
d314207779 test: Replace usage of importaddress (Ava Chow)
fcc457573f test: Replace importprivkey with wallet_importprivkey (Ava Chow)
94c87bbbd0 test: Remove unnecessary importprivkey from wallet_createwallet (Ava Chow)

Pull request description:

  `RPCOverloadWrapper` implemented overloads for legacy wallet only RPCs so that the same function call could be used within tests for both legacy wallets and descriptor wallets. With legacy wallets now removed, there is no need to continue to have these overloads.

  For `importaddress`, `addmultisigaddress`, and `importpubkey`, the uses of these are converted to `importdescriptors`.

  For `importprivkey`, a new helper function `wallet_imporprivkey` is introduced that does what the overload did. This is mainly to reduce verbosity as `importprivkey` was more widely used throughout the tests.

  Some tests that used these RPCs are now also no longer relevant and have been removed.

ACKs for top commit:
  Sjors:
    ACK b104d44227
  pablomartin4btc:
    cr ACK b104d44227
  rkrux:
    ACK b104d44227
  w0xlt:
    ACK b104d44227

Tree-SHA512: ded2f73829e2ce28466d4a9738eb382783ad990daee5d1859dbc4d354e6f8eec0c483ed5ecb1287fe0dd24ac332065b733a30d71b126b841bd7cd49e9a094b6d

test/functional/test_framework/test_framework.py

@@ -35,6 +35,7 @@ from .util import (
     initialize_datadir,
     p2p_port,
     wait_until_helper_internal,
+    wallet_importprivkey,
 )
 
 
@@ -485,7 +486,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
             n = self.nodes[node]
             if wallet_name is not None:
                 n.createwallet(wallet_name=wallet_name, load_on_startup=True)
-            n.importprivkey(privkey=n.get_deterministic_priv_key().key, label='coinbase', rescan=True)
+            wallet_importprivkey(n.get_wallet_rpc(wallet_name), n.get_deterministic_priv_key().key, 0, label="coinbase")
 
     def run_test(self):
         """Tests must override this method to define test logic"""