Auto merge of #122721 - oli-obk:merge_queries, r=davidtwco

Replace `mir_built` query with a hook and use mir_const everywhere instead

A small perf improvement due to less dep graph handling.

Mostly just a cleanup to get rid of one of our many mir queries

compiler/rustc_incremental/src/persist/dirty_clean.rs

@@ -65,7 +65,7 @@ const BASE_HIR: &[&str] = &[
 const BASE_IMPL: &[&str] =
     &[label_strs::associated_item_def_ids, label_strs::generics_of, label_strs::impl_trait_header];
 
-/// DepNodes for mir_built/Optimized, which is relevant in "executable"
+/// DepNodes for exported mir bodies, which is relevant in "executable"
 /// code, i.e., functions+methods
 const BASE_MIR: &[&str] = &[label_strs::optimized_mir, label_strs::promoted_mir];