[SYCL][E2E] Disable flaky test fpga_pipes.cpp (#14309)

#14308

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

Author: sarnex

sycl/test-e2e/Basic/fpga_tests/fpga_pipes.cpp

@@ -1,4 +1,6 @@
 // REQUIRES: accelerator
+// https://github.com/intel/llvm/issues/14308
+// UNSUPPORTED: accelerator
 // RUN: %{build} -o %t.out
 // RUN: %{run} %t.out