Auto merge of rust-lang#119771 - oli-obk:random_experiment_12, r=<try>

Try caching the collect_and_partition_mono_items query

r? `@ghost`

an experiment to debug some performance issues encountered in rust-lang#112879

Author: bors

compiler/rustc_middle/src/query/mod.rs

@@ -1878,7 +1878,6 @@ rustc_queries! {
     }
 
     query collect_and_partition_mono_items(_: ()) -> (&'tcx DefIdSet, &'tcx [CodegenUnit<'tcx>]) {
-        eval_always
         desc { "collect_and_partition_mono_items" }
     }