test: Remove wallet option from non-wallet tests

Review note: The changes are complete, because self.options.descriptors
is set to None in parse_args (test_framework.py).

A value of None implies -disablewallet, see the previous commit.

So if a call to add_wallet_options is missing, it will lead to a test
failure when the wallet is compiled in.

test/functional/feature_taproot.py

@@ -1229,6 +1229,7 @@ UTXOData = namedtuple('UTXOData', 'outpoint,output,spender')
 
 class TaprootTest(BitcoinTestFramework):
     def add_options(self, parser):
+        self.add_wallet_options(parser)
         parser.add_argument("--dumptests", dest="dump_tests", default=False, action="store_true",
                             help="Dump generated test cases to directory set by TEST_DUMP_DIR environment variable")