Test with SYCL in the CI

Author: masterleinad

.github/workflows/cmake.yml

@@ -28,7 +28,7 @@ jobs:
           # To get new URL, look here:
           # https://www.intel.com/content/www/us/en/developer/articles/tool/oneapi-standalone-components.html#inpage-nav-6-undefined
           compiler_url: https://registrationcenter-download.intel.com/akdlm/IRC_NAS/ebf5d9aa-17a7-46a4-b5df-ace004227c0e/l_dpcpp-cpp-compiler_p_2023.2.1.8_offline.sh
-          cxx_flags_extra: "-DMDSPAN_USE_BRACKET_OPERATOR=0 -Wextra-semi -Wno-c++17-attribute-extensions -Wno-gnu-zero-variadic-macro-arguments"
+          cxx_flags_extra: "-DMDSPAN_USE_BRACKET_OPERATOR=0 -Wextra-semi -Wno-c++17-attribute-extensions -Wno-gnu-zero-variadic-macro-arguments -fsycl"
         - enable_benchmark: ON
         - stdcxx: 14
           enable_benchmark: OFF