[clang] [Clang][NFC] Remove incorrect SYCL tests (PR #109182)

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elizabethandrews wrote:

> Ah, I remember now why the SYCL flag / mode was abused here (the default AS Map for SPIR-V is problematic in this case); I believe that using the `spirv64-amd-amdhsa` triple instead of `spirv64-unknown-unknown` will work, and allow for the removal of the SYCL references.

I tried changing the triple. The address spaces changed for several tests but I do not know if change is correct or not since I am very unfamiliar with what the expected behavior here is. I have uploaded the changes for your review. Could you please verify the address space changes are correct. I do not want to be testing for the wrong thing in the CHECK lines.

In some tests, using the new triple causes the test to crash. For those, I just removed the test itself.  

Personally I would like to submit the PR to remove the incorrect SYCL tests without changing the triple (unless you can verify these new test changes are correct), and have someone more familiar with this area of code to follow-up with the right tests for https://github.com/llvm/llvm-project/pull/88182

https://github.com/llvm/llvm-project/pull/109182