Resize images on-demand with `gm convert`
This implements image resizing using the approach described in gitlab#230519 (closed) :
On each resizing request, we spawn a separate gm
process which would be responsible for the resizing.
We use to hijack the request by a workhorse injected.
The handler is being sent from Rails app (gitlab!37342 (merged)) and it is currently under the feature flag.
Edited by Aleksei Lipniagov