Move rustc_middle::values module to rustc_middle::query::values.

It's a better place for it, because it relates to queries.

compiler/rustc_middle/src/lib.rs

@@ -81,7 +81,6 @@ pub mod thir;
 pub mod traits;
 pub mod ty;
 pub mod util;
-pub mod values;
 
 #[macro_use]
 pub mod query;

compiler/rustc_middle/src/query/mod.rs

@@ -13,6 +13,7 @@ mod keys;
 pub mod on_disk_cache;
 #[macro_use]
 pub mod plumbing;
+pub mod values;
 
 pub fn describe_as_module(def_id: impl Into<LocalDefId>, tcx: TyCtxt<'_>) -> String {
     let def_id = def_id.into();

compiler/rustc_query_impl/src/lib.rs

@@ -19,8 +19,8 @@ use rustc_middle::queries::{
 use rustc_middle::query::AsLocalKey;
 use rustc_middle::query::on_disk_cache::{CacheEncoder, EncodedDepNodeIndex, OnDiskCache};
 use rustc_middle::query::plumbing::{QuerySystem, QuerySystemFns, QueryVTable};
+use rustc_middle::query::values::Value;
 use rustc_middle::ty::TyCtxt;
-use rustc_middle::values::Value;
 use rustc_query_system::dep_graph::SerializedDepNodeIndex;
 use rustc_query_system::ich::StableHashingContext;
 use rustc_query_system::query::{