src: remove unnecessary compute device info header dependencies

[rjoursler]

The nGEN interface used for devices is ngen::Product. To enable better interoperation between oneDNN and nGEN, this PR modifies device_info_t to store the ngen::Product. In particular, as intel GPU third party dependencies are included via src/gpu/CMakeLists.txt, nGEN is not available outside this directory, so implicit dependencies on gpu/intel/compute/device_info.hpp outside of the src/gpu/ directories are removed. In particular, these implicit dependencies were injected via gpu/intel/compute_engine.hpp, gpu/intel/compute_kernel.hpp, and gpu/intel/ocl/ocl_utils.hpp. This PR restructures these headers to remove the device_info.hpp dependency from these headers.

[dzarukin]

Could you, please, extend the PR description with overview changes and what's the actual benefit of adding a direct nGEN dependency and a bunch of forward declaration to support it? Having an explanation why direct use of nGEN header is not possible given that a direct dependency is introduced would be helpful as well.

[rjoursler]

Having an explanation why direct use of nGEN header is not possible given that a direct dependency is introduced would be helpful as well.

I added a description. The core issue is that the nGEN headers are only enabled within the src/gpu directory, so we get compilation errors if we add an nGEN dependency to device_info.hpp. We could alternatively just include nGEN headers everywhere in oneDNN (when applicable), but this PR keeps the current status quo as nGEN really should not be necessary as a dependency in src/xpu or src/graph,

[dzarukin]

@spalicki, Could you, please, take a look one this one?

[rjoursler]

make test
disable test_device_cpu