Show Pipeline status overlay on page Favicon

What does this MR do?

Shows dynamic Pipeline status as Page Favicon. See #12818 (closed)

Why was this MR needed?

See #12818 (closed)

Screenshots (if relevant)

MR page

Pipeline Index Page

Build real-time update (ignore colors in this GIF)

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 merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #12818 (closed)