### 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_error(RTR("Array size mismatch."));
									return ERR_PARSE_ERROR;
								}
								tk = _get_token();
							}
						}
					} else {
						if (unknown_size) {
							_set_error(RTR("Expected array initialization."));
							return ERR_PARSE_ERROR;
						}
						if (is_const) {
							_set_error(RTR("Expected initialization of constant."));
							return ERR_PARSE_ERROR;
						}
					}
					array_size = var.array_size;
				} else if (tk.type == TK_OP_ASSIGN) {
					
					Node *n = _parse_and_reduce_expression(p_block, p_function_info);
					if (!n) {
						return ERR_PARSE_ERROR;
					}
					if (is_const && n->type == Node::NODE_TYPE_OPERATOR && static_cast<OperatorNode *>(n)->op == OP_CALL) {
						OperatorNode *op = static_cast<OperatorNode *>(n);
						for (int i = 1; i < op->arguments.size(); i++) {
							if (!_check_node_constness(op->arguments[i])) {
								_set_error(vformat(RTR("Expected constant expression for argument %d of function call after '='."), i - 1));
								return ERR_PARSE_ERROR;
							}