Rollup merge of #90771 - asterycs:fix/trait-object-error-code, r=michaelwoerister

Fix trait object error code

closes #90768

I `grep`:d and changed the occurrences that seemed relevant. Please let me know what you think and if anything is missing!

compiler/rustc_typeck/src/check/fn_ctxt/_impl.rs

@@ -952,7 +952,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                     let mut err = rustc_errors::struct_span_err!(
                         self.sess(),
                         self_ty.span,
-                        E0783,
+                        E0782,
                         "{}",
                         msg,
                     );