[SYCL][E2E] Update pf-wg-atomic64.cpp (#16029)

This DISABLED does nothing. As I understand this test should be run on a
device without atomic64 support.

Author: KornevNikita

sycl/test-e2e/Regression/pf-wg-atomic64.cpp

@@ -1,4 +1,6 @@
-// DISABLED: aspect-atomic64
+// UNSUPPORTED: aspect-atomic64
+// UNSUPPORTED-INTENDED: The test is intended for devices without atomic64
+// support.
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out