Reorder fullfillment errors to keep more interesting ones first

In `report_fullfillment_errors` push back `T: Sized`, `T: WellFormed`
and coercion errors to the end of the list. The pre-existing
deduplication logic eliminates redundant errors better that way, keeping
the resulting output with fewer errors than before, while also having
more detail.

compiler/rustc_passes/src/check_attr.rs

@@ -2373,7 +2373,7 @@ impl CheckAttrVisitor<'_> {
 
         let errors = ocx.select_all_or_error();
         if !errors.is_empty() {
-            infcx.err_ctxt().report_fulfillment_errors(&errors);
+            infcx.err_ctxt().report_fulfillment_errors(errors);
             self.abort.set(true);
         }
     }