Advanced search migration for catalog resources

What does this MR do and why?

Adds two indexes to the existing Project index - ci_catalog boolean and readme_content text field

How to set up and validate locally

1. Run local development with elasticsearch and sidekiq running

gdk start

2. Run the migration

bundle exec rake gitlab:elastic:index

3. Run the following query and make sure the ci_catalog and readme_content attribute is present

curl -H 'Content-type: application/json' -XGET 'http://localhost:9200/gitlab-development' | json_pp

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Resolves: #396556 (closed)