Mark crate_inherent_impls as eval_always.

This is global query, so it will probably be invalidated anyway.

This was creating a compound dependency from any typeck to any hir_owner:
typeck -> incoherent_impls -> crate_incoherent_impls ->
crate_inherent_impls -> hir_owner.

This dependency was (incorrectly?) flagged by the ui/dep-graph tests as
problematic.

compiler/rustc_middle/src/query/mod.rs

@@ -869,6 +869,7 @@ rustc_queries! {
     /// Not meant to be used directly outside of coherence.
     query crate_inherent_impls(k: ()) -> CrateInherentImpls {
         storage(ArenaCacheSelector<'tcx>)
+        eval_always
         desc { "all inherent impls defined in crate" }
     }