Refactor to remove switch statement in build_rocm.sh

This commit refactors build_rocm.sh and brings in a few major updates:
 - No longer required to specify the full .so name (with number) for ROCm libraries
       - The .so versions are copied and the patching code will fix the links to point to this version
 - No longer required to specify paths for ROCm libraries allowing the removal of the large switch
       - Paths are acquired programmatically with find
 - No longer required to specify both the path and filename for the OS specific libraries
       - Programatically extract file name from the path
 - Automatically extract Tensile/Kernels files for the architectures specified in PYTORCH_ROCM_ARCH
   and any non-arch specific files e.g. TensileLibrary.dat

Author: jataylo