### 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 (keyword_completion_context & CF_FUNC_DECL_PARAM_SPEC) {
							keyword_completion_context ^= CF_FUNC_DECL_PARAM_SPEC;
						}
						if (keyword_completion_context & CF_PRECISION_MODIFIER) {
							keyword_completion_context ^= CF_PRECISION_MODIFIER;
						}
						if (_lookup_next(next)) {
							if (is_token_datatype(next.type)) {
								keyword_completion_context = CF_UNSPECIFIED;
							}
						}
#endif 
					}
					is_struct = false;
					if (shader->structs.has(tk.text)) {
						is_struct = true;
						param_struct_name = tk.text;
#ifdef DEBUG_ENABLED
						if (check_warnings && HAS_WARNING(ShaderWarning::UNUSED_STRUCT_FLAG) && used_structs.has(param_struct_name)) {
							used_structs[param_struct_name].used = true;
						}
#endif 
					}
					if (!is_struct && !is_token_datatype(tk.type)) {
						_set_error(RTR("Expected a valid data type for argument."));
						return ERR_PARSE_ERROR;
					}
					if (param_qualifier == ARGUMENT_QUALIFIER_OUT || param_qualifier == ARGUMENT_QUALIFIER_INOUT) {
						if (is_sampler_type(get_token_datatype(tk.type))) {