Rollup merge of rust-lang#144726 - jdonszelmann:move-attr-data-structures, r=lcnr

merge rustc_attr_data_structures into rustc_hir

this move was discussed on zulip: [#t-compiler > attribute parsing rework @ 💬](https://rust-lang.zulipchat.com/#narrow/channel/131828-t-compiler/topic/attribute.20parsing.20rework/near/528530091)

Many PRs in the attribute rework depend on this move.

Author: jdonszelmann