Auto merge of #89266 - cjgillot:session-ich, r=michaelwoerister

Move ICH to rustc_query_system

Based on https://github.com/rust-lang/rust/pull/89183

The StableHashingContext does not need to be in rustc_middle.

This PR moves it to rustc_query_system. This will avoid a dependency between rustc_ast_lowering and rustc_middle in https://github.com/rust-lang/rust/pull/89124.

compiler/rustc_middle/src/ty/mod.rs

@@ -20,8 +20,6 @@ pub use generics::*;
 pub use vtable::*;
 
 use crate::hir::exports::ExportMap;
-use crate::ich::StableHashingContext;
-use crate::middle::cstore::CrateStoreDyn;
 use crate::mir::{Body, GeneratorLayout};
 use crate::traits::{self, Reveal};
 use crate::ty;
@@ -37,6 +35,8 @@ use rustc_hir::def::{CtorKind, CtorOf, DefKind, Res};
 use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LocalDefIdMap, CRATE_DEF_INDEX};
 use rustc_hir::Node;
 use rustc_macros::HashStable;
+use rustc_query_system::ich::StableHashingContext;
+use rustc_session::cstore::CrateStoreDyn;
 use rustc_span::symbol::{kw, Ident, Symbol};
 use rustc_span::Span;
 use rustc_target::abi::Align;
@@ -110,6 +110,7 @@ mod context;
 mod diagnostics;
 mod erase_regions;
 mod generics;
+mod impls_ty;
 mod instance;
 mod list;
 mod structural_impls;