AutoDevops relies on external content and can break without warning

Zendesk: https://gitlab.zendesk.com/agent/tickets/101961

Recently a URL we used in the install_dependencies function of AutoDevops gitlab-ci.yml file is no longer valid. We've since fixed this in master via gitlab-ci-yml@dd6e6100 but this is unreleased so does not help current AutoDevops users.

This brings up a great concern for any external URLs we use in AutoDevops. Suddenly anyone who uses AutoDevops has failing pipelines and they don't know why. Even more, if they figure out why the pipelines are failing, they can't fix it because they're using the built in file. Is it worthwhile to consider moving some of these dependencies to a webserver that we control? Then we can ensure things don't randomly break when third parties move things.