message: Mark the static crypto::tink::util::Status objects deprecated. In line with migration towards the absl::Status{,Or}.
diff: @@ -150,8 +150,11 @@ class Status {
  Status& operator=(const Status& other);
  // Some pre-defined Status objects
  + ABSL_DEPRECATED("Use OkStatus() instead.")
  static const Status& OK; // Identical to 0-arg constructor
  + ABSL_DEPRECATED("Use Status(absl::StatusCode::kCancelled, "") instead.")
  static const Status& CANCELLED;
  + ABSL_DEPRECATED("Use Status(absl::StatusCode::kUnknown, "") instead.")
  static const Status& UNKNOWN;
  // Accessors
  