8b49731211
Improve diagnostic for generic params from outer items (E0401) Generalize the wording of E0401 to talk about *outer items* instead of *outer functions* since the current phrasing is outdated. The outer item can be a function, constant, trait, ADT or impl block (see the new UI test for the more exotic examples). Further, don't suggest introducing generic parameters to constant items unless the feature `generic_const_items` is enabled. Lastly, make E0401 translatable while we're at it. Fixes #115720.