Resolve "Remove links from Web IDE unexpectedly navigate you to a different page"

What does this MR do?

This MR removes the blame, history, permailink, and download buttons from the web IDE. It replaces them with a single "Open in file view" button that takes you to the file view page in a new window.

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

In the spec test for this, I've used a generic a selector. It works but it doesn't sit right with me. But short of adding a class to the button just for the tests, I'm not sure what a better solution would be.

Why was this MR needed?

Because the aforementioned buttons would take you to a new page unexpectedly. This makes it a little more clear what will happen when you click the link.

See the related issue for more discussion.

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
• Conform by the code review guidelines
  • Has been reviewed by a UX Designer
  • Has been reviewed by a Frontend maintainer
  • Has been reviewed by a Backend maintainer
  • Has been reviewed by a Database specialist
• Conform by the merge request performance guides
• Conform by the style guides
• If you have multiple commits, please combine them into a few logically organized commits by squashing them
• Internationalization required/considered
• End-to-end tests pass (package-and-qa manual pipeline job)

What are the relevant issue numbers?

Closes #45520 (closed)