10-4-stable-ee-prepare-rc3 with weekend commits missing from RC1

What does this MR do?

• app/assets/images/icons.json
• app/assets/images/icons.svg
• app/helpers/branches_helper.rb
• app/workers/check_gcp_project_billing_worker.rb
• db/schema.rb
• lib/gitlab/git/repository.rb
• spec/features/projects/clusters/gcp_spec.rb
• spec/features/projects/jobs_spec.rb
• spec/requests/api/jobs_spec.rb
• spec/workers/check_gcp_project_billing_worker_spec.rb

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• If paid feature, have we considered GitLab.com plan and how it works for groups and is there a design for promoting it to users who aren't on the correct plan

What are the relevant issue numbers?

Closes #10 (closed)