[L0] Fix UR_KERNEL_INFO_ATTRIBUTES returned value

Currently L0 adapter returns garbage value for that property because
string is incorrectly copied to the output buffer.
Probably ur::getInfo implementation should be fixed to handle such cases
properly.

Author: againull

source/adapters/level_zero/kernel.cpp

@@ -746,7 +746,7 @@ ur_result_t urKernelGetInfo(
       char *attributes = new char[Size];
       ZE2UR_CALL(zeKernelGetSourceAttributes,
                  (Kernel->ZeKernel, &Size, &attributes));
-      auto Res = ReturnValue(attributes);
+      auto Res = ReturnValue(static_cast<const char *>(attributes));
       delete[] attributes;
       return Res;
     } catch (const std::bad_alloc &) {

test/conformance/kernel/urKernelGetInfo.cpp

@@ -46,6 +46,22 @@ TEST_P(urKernelGetInfoTest, Success) {
         ASSERT_GT(*returned_reference_count, 0U);
         break;
     }
+    case UR_KERNEL_INFO_ATTRIBUTES: {
+        auto returned_attributes = std::string(property_value.data());
+        ur_platform_backend_t backend;
+        ASSERT_SUCCESS(urPlatformGetInfo(platform, UR_PLATFORM_INFO_BACKEND,
+                                         sizeof(backend), &backend, nullptr));
+        if (backend == UR_PLATFORM_BACKEND_OPENCL ||
+            backend == UR_PLATFORM_BACKEND_LEVEL_ZERO) {
+            // Older intel drivers don't attach any default attributes and newer ones force walk order to X/Y/Z using special attribute.
+            ASSERT_TRUE(returned_attributes.empty() ||
+                        returned_attributes ==
+                            "intel_reqd_workgroup_walk_order(0,1,2)");
+        } else {
+            ASSERT_TRUE(returned_attributes.empty());
+        }
+        break;
+    }
     default:
         break;
     }