[SYCL][E2E][BINDLESS] Add ptr to ptr of image_handle test failing on level zero only

[JackAKirk]

This test passes on the cuda backend but fails on level_zero. It allocates a single element array of unsampled_image_handle*, pointing to a valid unsampled_image_handle that is dereferenced on the device. The casting to generic void* is not necessary to make the test fail on l0, but is done to keep this test matching the original bug report we received.

Note that rewriting this test to make an identical dereference with for example a single 2d C array of long passes on level_zero, indicating that this issue is specific to image_handles.

[ProGTX]

I think the code makes sense, but it's difficult to understand what's going on, I've made some suggestions to help the reader. So if it's passing on CUDA but failing on L0 it might be an issue with either the L0 driver or with IGC.

[JackAKirk]

@intel/llvm-gatekeepers this is ready to merge.

Thanks