container: friendlier error message for op timing out

This includes the string for the failing op which helps with troubleshooting.

Signed-off-by: Ophestra <cat@gensokyo.uk>

container/init.go

@@ -431,6 +431,8 @@ func initEntrypoint(k syscallDispatcher, msg message.Msg) {
 		if err := op.late(state, k); err != nil {
 			if m, ok := messageFromError(err); ok {
 				k.fatal(msg, m)
+			} else if errors.Is(err, context.DeadlineExceeded) {
+				k.fatalf(msg, "%s deadline exceeded", op.String())
 			} else {
 				k.fatalf(msg, "cannot complete op at index %d: %v", i, err)
 			}