JSSpecCompiler: Make function arguments parsing much simpler

In a nutshell, when we understand that the expression is a function
call (this happens at '(' after an expression), stop parsing expression
and start parsing function arguments. This makes
`FunctionCallCanonicalizationPass` and the workaround for zero argument
function calls obsolete.

Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/AST/ASTPrinting.cpp

@@ -43,7 +43,6 @@ void WellKnownNode::dump_tree(StringBuilder& builder)
         "This"sv,
         "True"sv,
         "Undefined"sv,
-        "ZeroArgumentFunctionCall"sv,
     };
     dump_node(builder, "WellKnownNode {}", type_to_name[m_type]);
 }