Compile on newer clang (#1581)

Need iomanip header for latest clang on macos

Relates-To: MINOR

Signed-off-by: Harald Fernengel <harald.fernengel@here.com>

Author: haraldF

olp-cpp-sdk-authentication/tests/CryptoTest.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 HERE Europe B.V.
+ * Copyright (C) 2020-2025 HERE Europe B.V.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@
 
 #include <gtest/gtest.h>
 
+#include <iomanip>
 #include <sstream>
 
 #include <olp/authentication/Crypto.h>