Allow type error config in uitest

crates/compiler/uitest/src/uitest.rs

@@ -254,6 +254,7 @@ impl<'a> TestCase<'a> {
         for infer_opt in found_infer_opts {
             let opt = infer_opt.name("opt").unwrap().as_str();
             match opt.trim() {
+                "allow_errors" => infer_opts.allow_errors = true,
                 "print_only_under_alias" => infer_opts.print_only_under_alias = true,
                 other => return Err(format!("unknown infer option: {other:?}").into()),
             }