Add cmake checks for SYCL features

[Luigi-Crisci]

Previously if a SYCL2020 feature was not implemented by a compiler, the benchmark compilation was just failing. This PR adds cmake checks to cover three SYCL2020 features:

• Specialization constants (or sycl::specialized for AdaptiveCpp)
• Kernel reductions
• Group algorithms In addition, it also adds a check for FP64 compatibility to selectively enable benchmark that uses FP64 types. The check structure can also be expanded in the future with additional features check if necessary.