The plugins packages defines the plugins used by containerd.
Move all the types and properties to this package.
Signed-off-by: Derek McGowan <derek@mcg.dev>
This is not really an error in most cases as most people do not use
devmapper, however this shows up as an error in the logs and in the
plugin service when querying the plugins.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
