Support for dependencies on CI/CD

[laurentsimon]

It' be awesome to support CI/CD systems such as, for example, github actions and Google's cloud build.

Both of these make intensive use of repos that developers also want to be able to update.

OpenSSF's scorecard is working on supporting this too.

[jurre]

We already have support for GitHub Actions, I'm not super familiar with Google cloud build, but from a first glance it seems like it'd be pretty similar to actions.

However, currently we've paused adding new ecosystems, so I can't give any indication as to when we might be able to start looking into adding support for GCB

[jeffwidman]

Closing as a duplicate of #2140 which already tracks Google Cloud Build.