Adjust tests since opaque structs are no longer accepted by Any.

typed-racket-test/succeed/exn-any-mutation.rkt

@@ -4,7 +4,7 @@
   (define (f x) x))
 (module typed typed/racket
   (require typed/rackunit)
-  (struct (X) s ([i : X]) #:mutable)
+  (struct (X) s ([i : X]) #:mutable #:transparent)
   (require/typed (submod ".." untyped)
                  [f (-> Any (s (U Integer String)))])
   (: s1 : (s Integer))

typed-racket-test/succeed/pr241-variation-3.rkt

@@ -5,7 +5,7 @@
 (module u racket/base
  (require racket/generic)
  (define-generics foo)
- (struct foo-struct () #:methods gen:foo [])
+ (struct foo-struct () #:methods gen:foo [] #:transparent)
  (define f1 (foo-struct))
  (provide f1 foo?))