### Godot version

4.0 beta (e1648b3327431a09cc9498663fac483275eb711d)

### System information

Mageia 9, Linux

### Issue description

When exporting a project with no attached script (or with only a builtin GDScript), the following error is printed:
```
ERROR: Can't open file from path 'res://.godot/global_script_class_cache.cfg'.
   at: get_file_as_bytes (core/io/file_access.cpp:699)
```

And while the export succeeds, when running the project, it prints:
```
ERROR: Couldn't find the given section "" and key "list", and no default was given.
   at: get_value (core/io/config_file.cpp:86)
```

We should ensure that this file is always created, regardless of whether there are scripts to parse for class names or not. It should always contain at least `list=[]`.

### Steps to reproduce

- Create new project
- Create main scene with no script
- Export

### Minimal reproduction project

[NewProj.zip](https://github.com/godotengine/godot/files/10547125/NewProj.zip)
_update_pending_script_classes();
						if (changed) {
							emit_signal(SNAME("filesystem_changed"));
						}
						emit_signal(SNAME("sources_changed"), sources_changed.size() > 0);
						first_scan = false;
					}
				} else if (!scanning && thread.is_started()) {
					set_process(false);
					if (filesystem) {
						memdelete(filesystem);
					}
					filesystem = new_filesystem;
					new_filesystem = nullptr;
					thread.wait_to_finish();
					_update_scan_actions();
					_update_pending_script_classes();
					emit_signal(SNAME("filesystem_changed"));
					emit_signal(SNAME("sources_changed"), sources_changed.size() > 0);
					first_scan = false;
				}
				if (!is_processing() && scan_changes_pending) {
					scan_changes_pending = false;
					scan_changes();
				}
			}
		} break;
	}
}
bool EditorFileSystem::is_scanning() const {