message: Update "OpaqueBytesAttr" to use "OpaqueElementsAttr" as storage type.
diff: @@ -107,7 +107,11 @@ def OpaqueBytesAttr : ElementsAttrBase<
  ".getElementType().isInteger(8)">,
  ]>,
  "opaque bytes attribute"
  - >;
  + > {
  + let storageType = [{ OpaqueElementsAttr }];
  + let returnType = [{ OpaqueElementsAttr }];
  + let convertFromStorage = "$_self";
  +}
  //===----------------------------------------------------------------------===//
  // Derived shape attribute class.
  