[SYCL][COMPAT] Adding 2-byte and 4-bytes memset operations to headers

[Alcpz]

This PR replaces #11340

This PR extends the memory header to include 2 byte and 4 byte memsets.

• memset remains unchanged.
  • 2D / 3D memsets are templated and wrap sycl::fill. Functionality remains unchanged as it is exposed through detail::memset<unsigned char>, equivalent to what we had before.
• memset_d16 and memset_d32 calls are added wrapped around sycl::fill using 2-byte and 4-byte datatypes

Added tests for memset_d16 and memset_d32.

[Alcpz]

@intel/llvm-gatekeepers This is ready for merging Thanks!

CUDA backend failure unrelated. Issue already reported.