[CE] Backport TokenAuthenticatable comparison method and stub_default_url_options

What

• TokenAuthenticatable provides comparison method
• Backport stub_default_url_options from EE

Why was this MR needed?

Changes from the EE MR at https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5782

Acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Conform by the code review guidelines
  • Has been reviewed by a Backend maintainer
  • Has been reviewed by a Database specialist
• Conform by the merge request performance guides
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?