Fix scoped relation inheritance deprecation [RUN ALL RSPEC] [RUN AS-IF-FOSS]

What does this MR do?

Class level methods no longer inherit scoping in Rails 6.1

Let's fix the warnings now to have the correct behavior when we migrate to 6.1.

Related issue: #328517 (closed)

PR with a fix: https://github.com/rails/rails/pull/35186