Rollup merge of #131660 - Urgau:non_local_def-131643, r=jieyouxu

Also use outermost const-anon for impl items in `non_local_defs` lint

This PR update the logic for the impl paths (items) in the `non_local_definitions` lint to also consider const-anon in case the impl definition is wrapped inside const-anon it-self wrapped into a const-anon where the items are.

r? `@jieyouxu` *(since you interacted on the issue)*
Fixes *(after beta-backport)* #131643

Author: matthiaskrgr