[clang-sycl-linker][clang-linker-wrapper] Move sycl linking code from linker wrapper to sycl linker#1

asudarsa wants to merge 51 commits intosyclasudarsa/llvm-2:syclfrom

move_sycl_linking_code_from_linker_wrapper_to_sycl_linkerasudarsa/llvm-2:move_sycl_linking_code_from_linker_wrapper_to_sycl_linkerCopy head branch name to clipboard