Use unified YAML schemas in the build process

In this commit we instruct the build system to use the unified schema
files  instead of collecting the `TUPLE-TREE-YAML` comments.

The fixes to C++ files are necessary because they depend on the order
of the fields in the schema, which was changed.

lib/Yield/ControlFlow/ConvertFromEFA.cpp

@@ -25,3 +25,7 @@ yield::FunctionEdge::FunctionEdge(const efa::FunctionEdge &Source) {
   Destination() = Source.Destination();
   Type() = yield::FunctionEdgeType::from(Source.Type());
 }
+
+const yield::CallEdge *yield::FunctionEdgeBase::getCallEdge() const {
+  return llvm::dyn_cast<CallEdge>(this);
+}