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_miniscript.py

@@ -322,10 +322,10 @@ class WalletMiniscriptTest(BitcoinTestFramework):
         self.log.info("Making a descriptor wallet")
         self.funder = self.nodes[0].get_wallet_rpc(self.default_wallet_name)
         self.nodes[0].createwallet(
-            wallet_name="ms_wo", descriptors=True, disable_private_keys=True
+            wallet_name="ms_wo", disable_private_keys=True
         )
         self.ms_wo_wallet = self.nodes[0].get_wallet_rpc("ms_wo")
-        self.nodes[0].createwallet(wallet_name="ms_sig", descriptors=True)
+        self.nodes[0].createwallet(wallet_name="ms_sig")
         self.ms_sig_wallet = self.nodes[0].get_wallet_rpc("ms_sig")
 
         # Sanity check we wouldn't let an insane Miniscript descriptor in