Disable fill test for command buffer v2 (#17844)

This PR disables flaky fill test for command buffer that was enabled in
intel/llvm#17709.
The issue is connected to the bug in the driver that is patched in new
version, but the CI machines still have the old one, which causes it to
sometimes fail (for example
https://github.com/intel/llvm/actions/runs/14250564960/job/39942652796?pr=17836)

Author: Xewar313

test/conformance/exp_command_buffer/fill.cpp

@@ -14,6 +14,11 @@ struct testParametersFill {
 struct urCommandBufferFillCommandsTest
     : uur::command_buffer::urCommandBufferExpTestWithParam<testParametersFill> {
   void SetUp() override {
+    // This test fails due to a bug in the Level-Zero driver, it can be
+    // reenabled after CI machines get their drivers updated
+    // https://github.com/intel/llvm/issues/17856
+    UUR_KNOWN_FAILURE_ON(uur::LevelZeroV2{});
+
     UUR_RETURN_ON_FATAL_FAILURE(
         uur::command_buffer::urCommandBufferExpTestWithParam<
             testParametersFill>::SetUp());