### 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
return nullptr;
				}
			}
			expression.push_back(o);
		} else {
			_set_tkpos(pos); 
			break;
		}
	}
	
	while (expression.size() > 1) {
		int next_op = -1;
		int min_priority = 0xFFFFF;
		bool is_unary = false;
		bool is_ternary = false;
		for (int i = 0; i < expression.size(); i++) {
			if (!expression[i].is_op) {
				continue;
			}
			bool unary = false;
			bool ternary = false;
			Operator op = expression[i].op;
			int priority;
			switch (op) {
				case OP_EQUAL:
					priority = 8;
					break;
				case OP_NOT_EQUAL:
					priority = 8;
					break;