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_hir_analysis/src/check/mod.rs

@@ -159,7 +159,7 @@ fn maybe_check_static_with_link_section(tcx: TyCtxt<'_>, id: LocalDefId) {
     // the consumer's responsibility to ensure all bytes that have been read
     // have defined values.
     if let Ok(alloc) = tcx.eval_static_initializer(id.to_def_id())
-        && alloc.inner().provenance().len() != 0
+        && alloc.inner().provenance().ptrs().len() != 0
     {
         let msg = "statics with a custom `#[link_section]` must be a \
                         simple list of bytes on the wasm target with no \