[SYCL] Guard defines_elementary include and fix e2e test build flag

Author: crystarm

sycl/include/sycl/info/context.hpp

@@ -8,7 +8,6 @@
 
 #pragma once
 
-#include <sycl/detail/defines_elementary.hpp>
 #include <sycl/detail/info_desc_traits.hpp>
 #include <unified-runtime/ur_api.h>
 
@@ -33,6 +32,7 @@ using context_runtime_traits =
     sycl::detail::rt_traits_base<sycl::detail::info_class::context>;
 
 #ifndef __INTEL_PREVIEW_BREAKING_CHANGES
+#include <sycl/detail/defines_elementary.hpp>
 struct __SYCL_DEPRECATED("info::context::reference_count is not part of "
                          "SYCL 2020") reference_count
     : context_traits<UR_CONTEXT_INFO_REFERENCE_COUNT> {

sycl/include/sycl/info/event.hpp

@@ -8,7 +8,6 @@
 
 #pragma once
 
-#include <sycl/detail/defines_elementary.hpp>
 #include <sycl/detail/info_desc_traits.hpp>
 #include <unified-runtime/ur_api.h>
 
@@ -38,6 +37,7 @@ struct command_execution_status
   using return_type = info::event_command_status;
 };
 #ifndef __INTEL_PREVIEW_BREAKING_CHANGES
+#include <sycl/detail/defines_elementary.hpp>
 struct __SYCL_DEPRECATED("info::event::reference_count is not part of "
                          "SYCL 2020") reference_count
     : event_traits<UR_EVENT_INFO_REFERENCE_COUNT> {

sycl/include/sycl/info/kernel.hpp

@@ -8,7 +8,6 @@
 
 #pragma once
 
-#include <sycl/detail/defines_elementary.hpp>
 #include <sycl/detail/info_desc_traits.hpp>
 #include <sycl/range.hpp>
 #include <unified-runtime/ur_api.h>
@@ -40,6 +39,7 @@ struct function_name : kernel_traits<UR_KERNEL_INFO_FUNCTION_NAME> {
   using return_type = std::string;
 };
 #ifndef __INTEL_PREVIEW_BREAKING_CHANGES
+#include <sycl/detail/defines_elementary.hpp>
 struct __SYCL_DEPRECATED("info::kernel::reference_count is not part of "
                          "SYCL 2020") reference_count
     : kernel_traits<UR_KERNEL_INFO_REFERENCE_COUNT> {

sycl/include/sycl/info/queue.hpp

@@ -8,7 +8,6 @@
 
 #pragma once
 
-#include <sycl/detail/defines_elementary.hpp>
 #include <sycl/detail/info_desc_traits.hpp>
 #include <unified-runtime/ur_api.h>
 
@@ -34,6 +33,7 @@ struct device : queue_traits<UR_QUEUE_INFO_DEVICE> {
   using return_type = sycl::device;
 };
 #ifndef __INTEL_PREVIEW_BREAKING_CHANGES
+#include <sycl/detail/defines_elementary.hpp>
 struct __SYCL_DEPRECATED("info::queue::reference_count is not part of "
                          "SYCL 2020") reference_count
     : queue_traits<UR_QUEUE_INFO_REFERENCE_COUNT> {

sycl/test-e2e/DeprecatedFeatures/reference_count.cpp

@@ -1,6 +1,6 @@
 // UNSUPPORTED: preview-mode
 // UNSUPPORTED-INTENDED: reference_count is unavailable in preview mode.
-// RUN: %{build} -o %t.out
+// RUN: %{build} -fsyntax-only
 
 //==---------- reference_count.cpp - Deprecated info test ------------------==//
 //