Remove Taproot activation height

Drop DEPLOYMENT_TAPROOT from consensus.vDeployments.

Bump MinBIP9WarningHeight.

Clarify what is considered a BuriedDeployment and
drop taproot from getdeploymentinfo RPC.

Add a test to getblocktemplate to ensure the taproot
rule is still set.

Co-Authored-By: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>

test/functional/rpc_blockchain.py

@@ -241,19 +241,6 @@ class BlockchainTest(BitcoinTestFramework):
                 },
                 'active': False
             },
-            'taproot': {
-                'type': 'bip9',
-                'bip9': {
-                    'start_time': -1,
-                    'timeout': 9223372036854775807,
-                    'min_activation_height': 0,
-                    'status': 'active',
-                    'status_next': 'active',
-                    'since': 0,
-                },
-                'height': 0,
-                'active': True
-            }
           }
         })