[SYCL] Remove sycl_ext_oneapi_group_algorithms (#9502)

Removed tests have SYCL 2020 versions in separate files under
test-e2e/GroupAlgorithm.

Author: aelovikov-intel

sycl/doc/extensions/deprecated/sycl_ext_oneapi_group_algorithms.asciidoc renamed to sycl/doc/extensions/removed/sycl_ext_oneapi_group_algorithms.asciidoc

@@ -79,7 +79,6 @@
 #include <sycl/ext/oneapi/experimental/opportunistic_group.hpp>
 #include <sycl/ext/oneapi/experimental/tangle_group.hpp>
 #include <sycl/ext/oneapi/filter_selector.hpp>
-#include <sycl/ext/oneapi/group_algorithm.hpp>
 #include <sycl/ext/oneapi/kernel_properties/properties.hpp>
 #include <sycl/ext/oneapi/matrix/matrix.hpp>
 #include <sycl/ext/oneapi/owner_less.hpp>

sycl/include/sycl/ext/oneapi/group_algorithm.hpp

@@ -5,8 +5,8 @@
 #include <numeric>
 #include <sycl/sycl.hpp>
 #include <vector>
+
 using namespace sycl;
-using namespace sycl::ext::oneapi;
 
 class back_to_back;
 
@@ -42,9 +42,9 @@ int main() {
         auto g = it.get_group();
         // Loop to increase number of back-to-back calls
         for (int r = 0; r < 10; ++r) {
-          Sum[i] = reduce(g, Input[i], sycl::plus<>());
-          EScan[i] = exclusive_scan(g, Input[i], sycl::plus<>());
-          IScan[i] = inclusive_scan(g, Input[i], sycl::plus<>());
+          Sum[i] = reduce_over_group(g, Input[i], sycl::plus<>());
+          EScan[i] = exclusive_scan_over_group(g, Input[i], sycl::plus<>());
+          IScan[i] = inclusive_scan_over_group(g, Input[i], sycl::plus<>());
         }
       });
     });
@@ -60,6 +60,9 @@ int main() {
   for (int i = 0; i < N; ++i) {
     passed &= (sum == Sum[i]);
   }
+
+  assert(passed);
+
   std::cout << "Test passed." << std::endl;
   return 0;
 }