Audit and unify menu options for Edit/Code menus

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Proposal

Across repository and code review pages, the menu options vary. We should audit and simplify/unify the options.

For example how we call the action to edit a single file

Edit in Rapid Diffs (not in prod, gdk only)	Edit on Blob/Repo

Related

• #585815
• &18457 (comment 3024208867)