### 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
r_options->push_back(option);
			}
		}
	}
#endif 
	switch (completion_type) {
		case COMPLETION_NONE: {
			
			return OK;
		} break;
		case COMPLETION_SHADER_TYPE: {
			for (const String &shader_type : p_info.shader_types) {
				ScriptLanguage::CodeCompletionOption option(shader_type, ScriptLanguage::CODE_COMPLETION_KIND_PLAIN_TEXT);
				r_options->push_back(option);
			}
			return OK;
		} break;
		case COMPLETION_RENDER_MODE: {
			if (is_shader_inc) {
				for (int i = 0; i < RenderingServer::SHADER_MAX; i++) {
					const Vector<ModeInfo> modes = ShaderTypes::get_singleton()->get_modes(RenderingServer::ShaderMode(i));
					for (int j = 0; j < modes.size(); j++) {
						const ModeInfo &info = modes[j];
						if (!info.options.is_empty()) {
							bool found = false;
							for (int k = 0; k < info.options.size(); k++) {
								if (shader->render_modes.has(String(info.name) + "_" + String(info.options[k]))) {
									found = true;
								}
							}