[SYCL][Graph] Support work_group_memory extension (#16229)
Document support for using
[sycl_ext_oneapi_work_group_memory](https://github.com/intel/llvm/blob/sycl/sycl/doc/extensions/experimental/sycl_ext_oneapi_work_group_memory.asciidoc)
inside a graph kernel node, with E2E tests for verification.
E2E Tests for `work_group_memory` update in executable graphs is has
been included in PR https://github.com/intel/llvm/pull/16025 , as it
requires a UR fix that is part of that PR.
