cranelift::codegen::Context::optimize(): reduce verbosity of "egraph stats" traces (#6122)

cranelift/codegen/src/context.rs

@@ -393,7 +393,7 @@ impl Context {
             &mut alias_analysis,
         );
         pass.run();
-        log::info!("egraph stats: {:?}", pass.stats);
+        log::debug!("egraph stats: {:?}", pass.stats);
         trace!("After egraph optimization:\n{}", self.func.display());
         Ok(())
     }