Rollup merge of #150627 - Coca162:without_provenance_diagnostics, r=Urgau

Add diagnostic items for `without_provenance` and `without_provenance_mut`

Adds diagnostic items for `core::ptr::without_provenance` and `core::ptr::without_provenance_mut`. Will be used to enhance clippy lint `transmuting_null`, see rust-lang/rust-clippy#16336.

Author: JonathanBrouwer