Move methods from Map to TyCtxt, part 2.

Continuing the work started in #136466.

Every method gains a `hir_` prefix, though for the ones that already
have a `par_` or `try_par_` prefix I added the `hir_` after that.

compiler/rustc_const_eval/src/check_consts/mod.rs

@@ -31,7 +31,7 @@ pub struct ConstCx<'mir, 'tcx> {
 impl<'mir, 'tcx> ConstCx<'mir, 'tcx> {
     pub fn new(tcx: TyCtxt<'tcx>, body: &'mir mir::Body<'tcx>) -> Self {
         let typing_env = body.typing_env(tcx);
-        let const_kind = tcx.hir().body_const_context(body.source.def_id().expect_local());
+        let const_kind = tcx.hir_body_const_context(body.source.def_id().expect_local());
         ConstCx { body, tcx, typing_env, const_kind }
     }