More flags for crictl ps.

[Random-Liu]

• -a, --all: Show running containers by default, and with -a show all containers.
• -s, --size: Show writable layer size of each container. I don't think we need virtual size now.
• -l, --latest: Show latest created container
• -n, --last int: Show n last created containers.
• --no-trunc: Not truncate id.

[Random-Liu]

And we could consider add similar flags for sandbox.

[weiwei04]

consider return sorted crictl ps result like docker ps?

[Random-Liu]

@weiwei04 The result is already sorted. #171

[Random-Liu]

• --no-trunc: For crictl images.
• -l: For crictl sandboxes.
• -n: For crictl sandboxes
• --no-trunc: For crictl sandboxes.