scripted-diff: test: remove 'descriptors=True' argument for createwallet calls

Descriptor wallets are already created by default since v23.0, but
since the recent legacy wallet removal this parameter *must* be True
(see commit 9f04e02ffa), i.e. still
passing it wouldn't contain any information for test readers
anymore. So simply drop them in the functional tests in order to
reduce code bloat.

-BEGIN VERIFY SCRIPT-
sed -i 's/, descriptors=True//g' $(git ls-files -- 'test/functional' ':(exclude)test/functional/wallet_backwards_compatibility.py')
sed -i '/descriptors=True,/d' ./test/functional/mempool_persist.py
-END VERIFY SCRIPT-

test/functional/wallet_multisig_descriptor_psbt.py

@@ -47,7 +47,7 @@ class WalletMultisigDescriptorPSBTTest(BitcoinTestFramework):
     def participants_create_multisigs(self, external_xpubs, internal_xpubs):
         """The multisig is created by importing the following descriptors. The resulting wallet is watch-only and every participant can do this."""
         for i, node in enumerate(self.nodes):
-            node.createwallet(wallet_name=f"{self.name}_{i}", blank=True, descriptors=True, disable_private_keys=True)
+            node.createwallet(wallet_name=f"{self.name}_{i}", blank=True, disable_private_keys=True)
             multisig = node.get_wallet_rpc(f"{self.name}_{i}")
             external = multisig.getdescriptorinfo(f"wsh(sortedmulti({self.M},{','.join(external_xpubs)}))")
             internal = multisig.getdescriptorinfo(f"wsh(sortedmulti({self.M},{','.join(internal_xpubs)}))")
@@ -77,7 +77,7 @@ class WalletMultisigDescriptorPSBTTest(BitcoinTestFramework):
         participants = {
             # Every participant generates an xpub. The most straightforward way is to create a new descriptor wallet.
             # This wallet will be the participant's `signer` for the resulting multisig. Avoid reusing this wallet for any other purpose (for privacy reasons).
-            "signers": [node.get_wallet_rpc(node.createwallet(wallet_name=f"participant_{self.nodes.index(node)}", descriptors=True)["name"]) for node in self.nodes],
+            "signers": [node.get_wallet_rpc(node.createwallet(wallet_name=f"participant_{self.nodes.index(node)}")["name"]) for node in self.nodes],
             # After participants generate and exchange their xpubs they will each create their own watch-only multisig.
             # Note: these multisigs are all the same, this just highlights that each participant can independently verify everything on their own node.
             "multisigs": []