disable test

Signed-off-by: Nick Sarnie <nick.sarnie@intel.com>

Author: sarnex

sycl/test-e2e/SubGroup/reduce.cpp

@@ -1,6 +1,9 @@
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out
 
+// XFAIL: linux && (arch-intel_gpu_pvc || arch-intel_gpu_bmg_g21) && !igc-dev
+// XFAIL-TRACKER: https://github.com/intel/llvm/issues/20757
+
 //==--------------- reduce.cpp - SYCL sub_group reduce test ----*- C++ -*---==//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.