Rollup merge of #111619 - cjgillot:profile-pass, r=WaffleLapkin

Add timings for MIR passes to profiling report

This will help identify which pass is responsible for a regression.

compiler/rustc_middle/src/mir/mod.rs

@@ -101,7 +101,7 @@ impl<'tcx> HasLocalDecls<'tcx> for Body<'tcx> {
 /// pass will be named after the type, and it will consist of a main
 /// loop that goes over each available MIR and applies `run_pass`.
 pub trait MirPass<'tcx> {
-    fn name(&self) -> &str {
+    fn name(&self) -> &'static str {
         let name = std::any::type_name::<Self>();
         if let Some((_, tail)) = name.rsplit_once(':') { tail } else { name }
     }