Backend: Construct component path from parts (stop fetching it from the database)

Problem

Currently, we save the full path ( gitlab.com/group/project/component-name@version ) to use a CI component in the path field of catalog_resource_components . We then pass that path to the frontend as the include_path field on the CiCatalogResourceComponent GraphQL type.

However, now that catalog resources can be moved, it's easy for the value in the database to get out of date. We need a solution that still works when a catalog resource project is moved.

Proposed solution

1. Add an include_path method to the Component model that builds the path
2. Update the GraphQL include_path field to use that method
3. Update Ci::Catalog::Resources::Versions::CreateService to stop populating the path field
4. Remove the path field from the database since it will no longer be used

The last dot point from the above list ☝ needs to be broken down into a few milestones. I have created child items on this issue to carry out this work.