add filter files into the catalog git repo to simplify filtering out stuff?

[jstrachan]

there's a number of boosters that don't work on OSIO right now; rather than making a branch and forking the whole catalog and deleting stuff, I'm wondering if some kinda filter file with patterns for including/excluding missions/runtimes/boosters to filter out might be the simplest approach to filtering stuff out?

i.e. to avoid loads of git issues as we try do keep doing PRs against different branches/forks for boosters that may be excluded for, say, OSIO but not for, say, on premise OSCP or OSD.

Given the wizards tend to use DeploymentType; I wonder if each DeploymentType could have an optional filter file associated with it; then we add a DeploymentType of OSIO - then we can keep a list of stuff to filter on on a per deployment basis in the catalog git repo and avoid lots of branching/forking?