scripted-diff: Replace CreateMockWalletDB with CreateMockableWalletDB

Since we have a mockable wallet database, we don't really need to be
using BDB or SQLite's in-memory database capabilities. It doesn't really
help us to be using those as we aren't doing anything that requires one
type of db over the other, and will just prefer SQLite if it's
available.

MockableDatabase is suitable for these uses, so use
CreateMockableWalletDatabase to use that.

-BEGIN VERIFY SCRIPT-
sed -i "s/CreateMockWalletDatabase(options)/CreateMockableWalletDatabase()/" $(git grep -l "CreateMockWalletDatabase(options)" -- ":(exclude)src/wallet/walletdb.*")
sed -i "s/CreateMockWalletDatabase/CreateMockableWalletDatabase/" $(git grep -l "CreateMockWalletDatabase" -- ":(exclude)src/wallet/walletdb.*")
-END VERIFY SCRIPT-

src/bench/wallet_loading.cpp

@@ -71,7 +71,7 @@ static void WalletLoading(benchmark::Bench& bench, bool legacy_wallet)
         options.create_flags = WALLET_FLAG_DESCRIPTORS;
         options.require_format = DatabaseFormat::SQLITE;
     }
-    auto database = CreateMockWalletDatabase(options);
+    auto database = CreateMockableWalletDatabase();
     auto wallet = BenchLoadWallet(std::move(database), context, options);
 
     // Generate a bunch of transactions and addresses to put into the wallet