Auto merge of #104054 - RalfJung:byte-provenance, r=oli-obk

interpret: support for per-byte provenance

Also factors the provenance map into its own module.

The third commit does the same for the init mask. I can move it in a separate PR if you prefer.

Fixes https://github.com/rust-lang/miri/issues/2181

r? `@oli-obk`

compiler/rustc_mir_transform/src/const_prop.rs

@@ -266,7 +266,7 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for ConstPropMachine<'mir, 'tcx>
         _tcx: TyCtxt<'tcx>,
         _machine: &Self,
         _alloc_id: AllocId,
-        alloc: ConstAllocation<'tcx, Self::Provenance, Self::AllocExtra>,
+        alloc: ConstAllocation<'tcx>,
         _static_def_id: Option<DefId>,
         is_write: bool,
     ) -> InterpResult<'tcx> {