Add cu_collections to Advanced Content Bundle

[kevincrafts]

Context

The cu_collections module has been deployed and enabled on a few sites but it needs to be added to a bundle before we open it up to anyone. The Advanced Content Bundle is a good fit.

Possible Fix

• Add cu_collections as a dependency to the Advanced Content Bundle
• Add an update hook to the Advanced Content Bundle to enable cu_collections

[kreynen]

We decided to define collections as its own bundle since it is unlikely that a majority of sites that have Advanced Content enabled would use collections.