Label tooltip on filepath of diffs to the action that will happen
## Proposal Originally discussed in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/195610#note_2589802236 1. For diffs on the Overview, clicking on the filepath will take you to the Changes tab 1. For diffs on the Changes tab, clicking on the filepath will open a new tab and take you to the file - This was the change made in https://gitlab.com/gitlab-org/gitlab/-/merge_requests/195610+ Proposed change is to have a tooltip to inform the user of the action that is going to be taken 1. For diffs on the Overview: `Go to file diff in Changes` 2. For diffs on the Changes tab: `View file @ SHA` Currently the tooltip on the filepath say what the name of the file path is. This filepath doesn't get truncated so we are not losing existing functionality ![CleanShot_2025-07-02_at_11.05.55](/uploads/782775904836e8aea69cbb588d162de2/CleanShot_2025-07-02_at_11.05.55.png)
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