Fix blob overflow menu permalink shortcut does not get triggered

What does this MR do and why?

This happens when user navigate to the blob page from repository page. This feature was originally added in !181901 (merged) and is behind the blob_overflow_menu feature flag.

References

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• !181901 (merged)

MR acceptance checklist

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Before	After
CleanShot 2025-03-06 at 18.47.24.mp4	CleanShot 2025-03-06 at 18.46.58.mp4

How to set up and validate locally

1. Enable blob_overflow_menu and enable blob_repository_vue_header_app feature flag

   Feature.enable(:blob_overflow_menu)
   Feature.enable(:blob_repository_vue_header_app)

1. Go to a directory
2. Go to a file
   1. The copied link (when flag is on) and the url in the search bar (when flag is off) should match
   2. This should work when viewing a file with:
      1. A branch
      2. A commit (Select Code > Commits > Select a commit > View file)
      3. A tag
   3. In all situations, the last selected line number should be append to the end of the link
   4. Press y should work the same as clicking the dropdown item
   5. Blame button remains in the header and should not be impacted by this change

Related to #452305 (closed)