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>

src/deploymentinfo.cpp

@@ -13,10 +13,6 @@ const std::array<VBDeploymentInfo,Consensus::MAX_VERSION_BITS_DEPLOYMENTS> Versi
         .name = "testdummy",
         .gbt_optional_rule = true,
     },
-    VBDeploymentInfo{
-        .name = "taproot",
-        .gbt_optional_rule = true,
-    },
 };
 
 std::string DeploymentName(Consensus::BuriedDeployment dep)