Remove calls to Rugged::BranchCollection#each from extracts_path before_action

What does this MR do?

Check for git data first on the cache later on git.

Why was this MR needed?

Remove Git data noise on dashboard to keep focusing on reducing those calls. This MR does not close original issue but I think is going to give us a better insight in what is happening.

What are the relevant issue numbers?

#18709 (closed)

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• [ ] Documentation created/updated
• [ ] API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together