ps: Add out-of-date VM manifest status indicator

[darkowlzz]

Update ps to check the current status of the VM containers by querying
the runtime and returning the actual status with an indicator for old
status info on disk manifest.

$ sudo ./bin/ignite ps -a
VM ID                   IMAGE                           KERNEL                                  SIZE    CPUS    MEMORY          CREATED         STATUS       IPS              PORTS   NAME
234d704a81a053f9        weaveworks/ignite-ubuntu:latest weaveworks/ignite-kernel:4.19.125       4.0 GB  1       512.0 MB        9m50s ago       *Up 9m50s    10.61.0.4                my-vm2
a6a381776cc6c60c        weaveworks/ignite-ubuntu:latest weaveworks/ignite-kernel:4.19.125       4.0 GB  1       512.0 MB        118m ago        Up 118m      10.61.0.2                my-vm
c19c691a01ba8f01        weaveworks/ignite-ubuntu:latest weaveworks/ignite-kernel:4.19.125       4.0 GB  1       512.0 MB        64m ago         *Up 64m      172.17.0.2               my-vm3

NOTE: The symbol * on the VM status indicates that the VM manifest on disk is not up-to-date with the actual VM status.

The note at the bottom is shown only when there's an out-of-date status in the result.

This will show the actual VM status and help avoid confusing the user when the machine actual state is different from the displayed state.