Revert "[UR][Graph] Disable flaky CTS test on L0 v2 (intel#18611)"

This reverts commit 99389f8.

Author: EuphoricThinking

unified-runtime/test/conformance/exp_command_buffer/enqueue.cpp

@@ -113,9 +113,6 @@ TEST_P(urEnqueueCommandBufferExpTest, SerializeAcrossQueues) {
 // Tests that submitting a command-buffer twice to an out-of-order queue
 // relying on implicit serialization semantics for dependencies.
 TEST_P(urEnqueueCommandBufferExpTest, SerializeOutofOrderQueue) {
-  // https://github.com/intel/llvm/issues/18610
-  UUR_KNOWN_FAILURE_ON(uur::LevelZeroV2{});
-
   ASSERT_SUCCESS(urEnqueueCommandBufferExp(out_of_order_queue, cmd_buf_handle,
                                            0, nullptr, nullptr));
   ASSERT_SUCCESS(urEnqueueCommandBufferExp(out_of_order_queue, cmd_buf_handle,