input: update all taproot script spends to optionally make the ctrl block

In this commit, we update all the taproot scripts spends to optionally
make the control block. This is useful in cases where we've already
created the control block, or may not have the items needed to construct
it in the first place.

We also add the control block to the sign descriptor itself.

input/size_test.go

@@ -998,7 +998,7 @@ var witnessSizeTests = []witnessSizeTest{
 			}
 
 			witness, err := input.TaprootHtlcSpendSuccess(
-				signer, signDesc, revokeKey.PubKey(), testTx,
+				signer, signDesc, testTx, revokeKey.PubKey(),
 				scriptTree,
 			)
 			require.NoError(t, err)