Auto merge of #112017 - Nemo157:unsafe-block-rustfix, r=eholk

Add MVP suggestion for `unsafe_op_in_unsafe_fn`

Rebase of rust-lang/rust#99827

cc tracking issue rust-lang/rust#71668

No real changes since the original PR, just migrated the new suggestion to use fluent messages and added a couple more testcases, AFAICT from the discussion there were no outstanding changes requested.