iox-#2011 Rename 'string.cpp' to fix the clang-tidy check

Author: elBoberido

iceoryx_platform/generic/source/string.cpp renamed to iceoryx_platform/generic/source/string_.cpp

@@ -14,6 +14,10 @@
 //
 // SPDX-License-Identifier: Apache-2.0
 
+// NOTE: This file is called 'string_.cpp' due to issues with clang-tidy. When the file is called 'string.cpp'
+// clang-tidy assumes to be the translation unit for 'iox/string.hpp' tries to check that header with the wrong
+// translation unit which leads to an error not finding the includes in 'iox/string.hpp'
+
 #include "iceoryx_platform/string.hpp"
 
 #ifndef IOX_PLATFORM_OVERRIDE_STRING_ALL