Show branch rules inherited by "All branches" and "All protected branches"

Proposal

Display rules inherited from "All branches" and "All protected branches" in branch rules detail view. Similar to MVC: Allow group-level MR approval rules for 'A... (&11451)

From #388149 (comment 1563361366)

For starters, develop on one of my projects shows "Required approvals (0)" BUT there is actually a "Merge Request Approval" rule that affects all branches (including develop). Surely the MR approval rule should be mentioned on this page?