Add initial support for Glab

[philclifford]

This works for Glab. none of the other gitlab-hosted packages are using the releases in the same way so this may have been a wasted trip down the api -> jq lane.

closes #946

Done:

• add a get_gitlab_release() to deb-get
• replace project id with urlencoded project path
• implement/use the CACHE
• ensure prettylist and csvlist work as expected

Todo:

• Add warning/error if jq not available (or add it to dependencies)
• support arm arches