SWDEV-437189 - Provide option to enable/disable CPACK_SET_DESTDIR

The variable is set as cache, so that user can override.
But the hard coded setting is preventing override. Removed the same

Change-Id: Ica5f9074a6532f465705a8dd1a8f21c6643ef49e


[ROCm/hip-tests commit: 173abcfba0]

projects/hip-tests/samples/packaging/CMakeLists.txt

@@ -32,7 +32,6 @@ include(GNUInstallDirs)
 #############################
 # Packaging steps
 #############################
-set(CPACK_SET_DESTDIR TRUE)
 if(NOT DEFINED CPACK_INSTALL_PREFIX)
   set(CPACK_INSTALL_PREFIX "/opt/rocm/")
 endif()