[SYCL][E2E] Fix lit to use arch selection and l0 v2 adapter

[mateuszpn]

The fix allows to use of _v1 and _v2 to select the l0 adapter and the use of arch to select the GPU, eg.:
llvm-lit --param "sycl_devices=level_zero_v2:arch-intel_gpu_mtl_u"
Necessary to run tests on integrated GPU on system with another GPU

[sarnex]

sorry can you point out which part fixes the CI failures?

[mateuszpn]

When a device is specified as :arch-, it doesn't contain generic :gpu or :cpu - and the tokens were normally used when parsing conditions like %if gpu in tests. Now, if only gpu exist in test.config.available_features, tests still can use %if gpu.
After reconsidering - architecture-based device selection makes sense only for GPUs, so "cpu" and "accelerator" will never be used and can be removed (they will work as before if
device name is like opencl:cpu)

[sarnex]

i would expect dev to be arch-intel_gpu_mtl_u or whatever, but i see isdigit check so what would the digits be?

[mateuszpn]

By the time we hit features.add(dev) sycl_device is already resolved SYCL name, eg. level_zero:1, not level_zero_v2:arch-intel_gpu. If the device name is given as :arch-, we have digit after colon, if it was generic (eg. :gpu) it is still generic.