creates gwtc catalog/superevent/gevent database tables and foreignkeys. assigns permissions to catalog_managers group, and sets up the creation API backend. 

TODO: work on querying and catalog event views. 

- New pipelines
- New FRD search
- Add upload permissions for brandon.oneal and ryan.fisher

by default the public alert page is cached 300s, but that can be changed
with an environment variable when deployed

This reverts commit ef1026e4.