### 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
}
						if (tk.type == TK_OP_ASSIGN) {
							if (!is_constant) {
								_set_error(vformat(RTR("Global non-constant variables are not supported. Expected '%s' keyword before constant definition."), "const"));
								return ERR_PARSE_ERROR;
							}
							if (constant.array_size > 0 || unknown_size) {
								bool full_def = false;
								VariableDeclarationNode::Declaration decl;
								decl.name = name;
								decl.size = constant.array_size;
								tk = _get_token();
								if (tk.type != TK_CURLY_BRACKET_OPEN) {
									if (unknown_size) {
										_set_expected_error("{");
										return ERR_PARSE_ERROR;
									}
									full_def = true;
									DataPrecision precision2 = PRECISION_DEFAULT;
									if (is_token_precision(tk.type)) {
										precision2 = get_token_precision(tk.type);
										tk = _get_token();
										if (!is_token_nonvoid_datatype(tk.type)) {
											_set_error(RTR("Expected data type after precision modifier."));
											return ERR_PARSE_ERROR;
										}
									}
									StringName struct_name2;
									DataType type2;
									if (shader->structs.has(tk.text)) {