refactor: use address_to_scriptpubkey to retrieve addresses scriptpubkey

This commit updates the code by replacing the RPC call used to
decode an address and retrieve its corresponding scriptpubkey
with the address_to_scriptpubkey function. address_to_scriptpubkey
function can now decode all addresses formats, which makes
it more efficient to use.

test/functional/wallet_avoidreuse.py

@@ -4,6 +4,7 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Test the avoid_reuse and setwalletflag features."""
 
+from test_framework.address import address_to_scriptpubkey
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_approx,
@@ -257,7 +258,7 @@ class AvoidReuseTest(BitcoinTestFramework):
         if not self.options.descriptors:
             # For the second send, we transmute it to a related single-key address
             # to make sure it's also detected as re-use
-            fund_spk = self.nodes[0].getaddressinfo(fundaddr)["scriptPubKey"]
+            fund_spk = address_to_scriptpubkey(fundaddr).hex()
             fund_decoded = self.nodes[0].decodescript(fund_spk)
             if second_addr_type == "p2sh-segwit":
                 new_fundaddr = fund_decoded["segwit"]["p2sh-segwit"]