[SYCL][PI][OpenCL] unhelpful piProgramCreate error code if extension not supported

The `piProgramCreate` function in [pi_opencl.cpp](https://github.com/intel/llvm/blob/5b9fd3ca018111046b471e7461d1a0ee46604d3a/sycl/plugins/opencl/pi_opencl.cpp#L516) checks late in its execution if a device supports the OpenCL `cl_khr_il_program` extension. If the check fails it returns a `CL_INVALID_CONTEXT` equivalent PI error code.
This error code seems to indicate that the context is bad and does not convey that a device in the context is missing an extension or is not an OpenCL 2.x device.