uwedolinsky

@intel/dpcpp-tools-reviewers @intel/dpcpp-cfe-reviewers @intel/dpcpp-clang-driver-reviewers please could you review? Thank you!

> It isn't clear to me what the FE changes are doing in this patch. Please add a FE test if there is functionality that can be tested with these...

> @uwedolinsky FE changes need FE tests. The tests you added are to test driver changes and an E2E test verifying FE changes. I do not think this is sufficient....

@intel/dpcpp-tools-reviewers please could you review? Thank you

@intel/llvm-gatekeepers this PR looks ready to merge. The approval from @intel/dpcpp-tools-reviewers seems no longer required because I [reverted a modifcation](https://github.com/intel/llvm/pull/15073/commits/6b72582ace1617a8bb8028cd08ffb5088a500502) to a file owned by this group. Please could you...