add callback for getContainerIp (#2851)

* add callback for getContainerIp

* register callback before retrieving info

* version bump; only use backports for linux

core/startos/src/install/mod.rs

@@ -541,7 +541,8 @@ pub async fn uninstall(
                 )),
             })
         })
-        .await?;
+        .await
+        .result?;
 
     let return_id = id.clone();