Allow configuring Advanced Search outside UI/Rails Console
Proposal
Allow configuring Advanced Search outside of UI/Rails Console.
Why?
Customers have expressed interest in being able to configure Advanced Search in their Helm template.
Problem
Advanced Search configuration seems to be stored in the database, and currently can only be configured via UI or Rails Console.
It seems like in our GitLab Environment Toolkit (GET), which uses Terraform and Ansible, sets the configuration manually in the database via Rails Console commands: https://gitlab.com/gitlab-org/gitlab-environment-toolkit/-/blob/main/ansible/roles/post_configure/tasks/advanced_search.yml#L115-116