### 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
keyword_completion_context = CF_BOOLEAN;
								}
#endif 
								
								Node *expr = _parse_and_reduce_expression(nullptr, constants);
								if (!expr) {
									return ERR_PARSE_ERROR;
								}
#ifdef DEBUG_ENABLED
								if (constant.type == DataType::TYPE_BOOL) {
									keyword_completion_context = CF_GLOBAL_SPACE;
								}
#endif 
								if (expr->type == Node::NODE_TYPE_OPERATOR && static_cast<OperatorNode *>(expr)->op == OP_CALL) {
									OperatorNode *op = static_cast<OperatorNode *>(expr);
									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;
										}
									}
								}
								constant.initializer = static_cast<ConstantNode *>(expr);
								if (!_compare_datatypes(type, struct_name, 0, expr->get_datatype(), expr->get_datatype_name(), expr->get_array_size())) {
									return ERR_PARSE_ERROR;
								}
							}
							tk = _get_token();
						} else {
							if (constant.array_size > 0 || unknown_size) {