librustc_hir: return LocalDefId instead of DefId in local_def_id#70909

bors merged 2 commits intorust-lang:masterrust-lang/rust:masterfrom

marmeladema:issue70853/librustc_hir-local-def-idmarmeladema/rust:issue70853/librustc_hir-local-def-idCopy head branch name to clipboard