[OpenMP] Disable a few more tests to get the bot green (llvm#163614)

Author: jhuber6

offload/test/offloading/CUDA/basic_launch_multi_arg.cu

@@ -8,7 +8,7 @@
 // REQUIRES: gpu
 //
 // FIXME: https://github.com/llvm/llvm-project/issues/161265
-// XFAIL: gpu
+// UNSUPPORTED: gpu
 
 #include <stdio.h>
 

offload/test/offloading/barrier_fence.c

@@ -4,6 +4,9 @@
 // RUN: %libomptarget-run-generic
 
 // REQUIRES: gpu
+//
+// FIXME: https://github.com/llvm/llvm-project/issues/161265
+// UNSUPPORTED: gpu
 
 #include <omp.h>
 #include <stdio.h>