test: Enable various tests for usage with cli

These tests run successfully on current master without any changes.

test/functional/rpc_preciousblock.py

@@ -36,7 +36,6 @@ class PreciousTest(BitcoinTestFramework):
     def set_test_params(self):
         self.setup_clean_chain = True
         self.num_nodes = 3
-        self.supports_cli = False
 
     def setup_network(self):
         self.setup_nodes()