SYCL: Add fp16 type support to unary op kernels (#12788)
* SYCL: Add fp16 support to some elementwise OP kernels * remove comment ggml-ci * Use static_cast directly * remove not needed cast from tanh * Use static cast and remove unneeded castings * Adjust device_support_op for unary OPs * Use cast_data and typed_data struct to deduplicate casting code
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