### Godot version

v4.0.beta13.official [caacade56]

### System information

Linux Ubuntu 20.04 with Unity desktop

### Issue description

When calling an undefined function in the shader editor with argument(s), such as `undefined_function(1)`, the error reads:

> Too many arguments for "undefined_function()" call. Expected at most 0 but received 1.

instead of the expected:

> No matching function found for: 'undefined_function'.

This is possibly a regression introduced in https://github.com/godotengine/godot/issues/18225, since the latter was focused on the arguments part.

To avoid such regression in the future, consider adding a unit test with this case (and, in fact, unit tests for the other signature errors too if there are not already).

### Steps to reproduce

1. Create a shader resource and open the shader editor
2. Enter `undefined_function(1);` in the fragment() definition

### Minimal reproduction project

N/A
_set_tkpos(prepos);
			StringName identifier;
			StructNode *pstruct = nullptr;
			bool struct_init = false;
			_get_completable_identifier(p_block, COMPLETION_IDENTIFIER, identifier);
			if (shader->structs.has(identifier)) {
				pstruct = shader->structs[identifier].shader_struct;
				struct_init = true;
			}
			tk = _get_token();
			if (tk.type == TK_PARENTHESIS_OPEN) {
				if (struct_init) { 
					const StringName &name = identifier;
					OperatorNode *func = alloc_node<OperatorNode>();
					func->op = OP_STRUCT;
					func->struct_name = name;
					func->return_cache = TYPE_STRUCT;
					VariableNode *funcname = alloc_node<VariableNode>();
					funcname->name = name;
					func->arguments.push_back(funcname);
					for (int i = 0; i < pstruct->members.size(); i++) {
						Node *nexpr;
						if (pstruct->members[i]->array_size != 0) {
							nexpr = _parse_array_constructor(p_block, p_function_info, pstruct->members[i]->get_datatype(), pstruct->members[i]->struct_name, pstruct->members[i]->array_size);
							if (!nexpr) {
								return nullptr;
							}
						} else {
							nexpr = _parse_and_reduce_expression(p_block, p_function_info);
							if (!nexpr) {