[clang] [clang][SYCL] Implement address space attributes for SYCL (PR #200849)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

I'm not sure that `top-level type of a variable declaration` is actually any better than the 'must be object pointer or reference'?  Maybe 'must be  pointer or reference', and let the function pointer check take care of clarifying it?  

https://github.com/llvm/llvm-project/pull/200849