test: enable functional tests with large rpc args for cli

Also, the following tests (for which self.supports_cli = False was not
set) will now work with --usecli:

feature_fastprune.py
feature_fee_estimation.py
feature_reindex_readonly.py
feature_taproot.py
mempool_package_rbf.py
p2p_net_deadlock.py
p2p_tx_download.py
rpc_packages.py

test/functional/wallet_taproot.py

@@ -191,7 +191,6 @@ class WalletTaprootTest(BitcoinTestFramework):
         self.num_nodes = 2
         self.setup_clean_chain = True
         self.extra_args = [['-keypool=100'], ['-keypool=100']]
-        self.supports_cli = False
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()