Move export from image commands to container commands
Move export from image commands to container commands

The export command operates on containers, not images, so it should be listed under the container commands, not the image commands.

Signed-off-by: David Lechner <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@lechnology.com>
dnephin/cli,allencloud/cli,riyazdf/cli,cpuguy83/cli,dnephin/cli,e11137/cli,Zebrilee/cli,allencloud/cli,redpanda/cli,ashfall/cli,redpanda/cli,thaJeztah/cli,Zebrilee/cli,cpuguy83/cli,e11137/cli,ashfall/cli,docker/cli,thaJeztah/cli,riyazdf/cli,docker/cli