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/mining_basic.py

@@ -65,7 +65,6 @@ class MiningTest(BitcoinTestFramework):
             ["-fastprune", "-prune=1"]
         ]
         self.setup_clean_chain = True
-        self.supports_cli = False
 
     def mine_chain(self):
         self.log.info('Create some old blocks')