[SYCL][E2E] XFAIL tests failing on new driver (#15813)

Failing
[here](https://github.com/intel/llvm/actions/runs/11452499228/job/31891617070?pr=15796),
I'll bump the driver after this change.

#15812

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

sycl/test-e2e/DiscardEvents/discard_events_check_images.cpp

@@ -1,6 +1,9 @@
 // UNSUPPORTED: hip
 // REQUIRES: aspect-ext_intel_legacy_image
 //
+// XFAIL: linux && gpu-intel-dg2
+// XFAIL-TRACKER: https://github.com/intel/llvm/issues/15812
+//
 // RUN: %{build} -o %t.out
 //
 // RUN: %{run} %t.out image

sycl/test-e2e/ESIMD/group_barrier.cpp

@@ -8,6 +8,9 @@
 // REQUIRES: arch-intel_gpu_pvc || gpu-intel-dg2
 // REQUIRES-INTEL-DRIVER: lin: 31155
 
+// XFAIL: linux && gpu-intel-dg2
+// XFAIL-TRACKER: https://github.com/intel/llvm/issues/15812
+
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out