Fix tests which fail if GPU is not available (only CPU is available)

[PokhodenkoSA]

This PR contains several fixes for tests which should be skipped if GPU is not available but they was not skipped.

1. dpctl.SyclContext("gpu") raises ValueError. It seems that catching dpctl.SyclQueueCreationError is copy/past error.
2. In test_context_can_be_used_in_queue2 exception was not caught.
3. TestGetCurrentDevice uses context opencl:gpu:0 in several tests so it should be skipped if GPU is not available.

[oleksandr-pavlyk]

This is good. I think we may as well introduce SyclContextCreationError and use that, for symmetry,

[PokhodenkoSA]

There are also a lot of failed tests when CPU is not available too.

[diptorupd]

@PokhodenkoSA @oleksandr-pavlyk We can use SYCL_DEVICE_FILTER (refer https://github.com/intel/llvm/blob/sycl/sycl/doc/EnvironmentVariables.md) to simulate testing with only a specific type of device. Can we setup multiple CI runs where we explicitly select a specific type of device and turn off other types using the environment variable?