lib: location: gnss: Fix setting of 'running' variable

In method_gnss_location_get(), 'running' variable is set after
submitting method_gnss_prepare_work_fn() into location_api_workq.
It has been seen that 'running' is not set when
method_gnss_prepare_work_fn() is executed meaning that
location_request() was called from a lower priority thread than
location_api_workq. We need to set 'running' before submitting
method_gnss_prepare_work_fn() into location_api_workq.

Jira: NCSDK-27001

Signed-off-by: Tommi Rantanen <tommi.rantanen@nordicsemi.no>

lib/location/method_gnss.c

@@ -1273,10 +1273,10 @@ int method_gnss_location_get(const struct location_request_info *request)
 		return err;
 	}
 
-	k_work_submit_to_queue(location_core_work_queue_get(), &method_gnss_prepare_work);
-
 	running = true;
 
+	k_work_submit_to_queue(location_core_work_queue_get(), &method_gnss_prepare_work);
+
 	return 0;
 }