Work on moving launch services handling into C

This will make it faster and also more robust, not recuring hacks like
re-execs.

kitty/logging.c

@@ -85,9 +85,5 @@ static PyMethodDef module_methods[] = {
 bool
 init_logging(PyObject *module) {
     if (PyModule_AddFunctions(module, module_methods) != 0) return false;
-#ifdef __APPLE__
-    // This env var can be either 1 or 2
-    if (getenv("KITTY_LAUNCHED_BY_LAUNCH_SERVICES") != NULL) use_os_log = true;
-#endif
     return true;
 }