Add bash completion for `dockerd --storage-opt overlay2.size`
Add bash completion for `dockerd --storage-opt overlay2.size`

This adds bash completion for
- https://github.com/docker/cli/pull/215
- https://github.com/moby/moby/pull/32977

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

thaJeztah/cli,dnephin/cli,docker/cli,Zebrilee/cli,docker/cli,ashfall/cli,redpanda/cli,ashfall/cli,cpuguy83/cli,allencloud/cli,thaJeztah/cli,riyazdf/cli,dnephin/cli,riyazdf/cli,allencloud/cli,cpuguy83/cli,Zebrilee/cli,redpanda/cli