[SYCL] Update reqd_work_group_size.cpp test with new attribute spelling (intel/llvm-test-suite#431)

The changes are due to the PR: intel#3427

Signed-off-by: Soumi Manna <[email protected]>

Author: smanna12

SYCL/Basic/reqd_work_group_size.cpp

@@ -28,7 +28,7 @@ int main() {
     Q.submit([&](handler &CGH) {
       CGH.parallel_for<class ReqdWGSizePositiveA>(
           nd_range<3>(range<3>(8, 8, 8), range<3>(4, 4, 4)), [=
-      ](nd_item<3>) [[intel::reqd_work_group_size(4, 4, 4)]]{});
+      ](nd_item<3>) [[sycl::reqd_work_group_size(4, 4, 4)]]{});
     });
     Q.wait_and_throw();
   } catch (nd_range_error &E) {
@@ -56,7 +56,7 @@ int main() {
       Q.submit([&](handler &CGH) {
         CGH.parallel_for<class ReqdWGSizeNoLocalPositive>(
             range<3>(16, 16, 16), [=
-        ](item<3>) [[intel::reqd_work_group_size(4, 4, 4)]]{});
+        ](item<3>) [[sycl::reqd_work_group_size(4, 4, 4)]]{});
       });
       Q.wait_and_throw();
     } catch (nd_range_error &E) {
@@ -85,7 +85,7 @@ int main() {
     Q.submit([&](handler &CGH) {
       CGH.parallel_for<class ReqdWGSizeNegativeA>(
           nd_range<3>(range<3>(16, 16, 16), range<3>(8, 8, 8)), [=
-      ](nd_item<3>) [[intel::reqd_work_group_size(4, 4, 4)]]{
+      ](nd_item<3>) [[sycl::reqd_work_group_size(4, 4, 4)]]{
 
                                                                 });
     });