[UR][L0v2] Mark cmd buffer test as a known failure

The urCommandBufferAppendMemBufferWriteRectTestWithParam.Success
testcase is known to fail sporadically on L0 adapter, the same happens
on L0 v2 adapter.

Author: kswiecicki

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

@@ -121,7 +121,7 @@ UUR_DEVICE_TEST_SUITE_WITH_PARAM(
         urCommandBufferAppendMemBufferWriteRectTestWithParam>);
 
 TEST_P(urCommandBufferAppendMemBufferWriteRectTestWithParam, Success) {
-  UUR_KNOWN_FAILURE_ON(uur::LevelZero{});
+  UUR_KNOWN_FAILURE_ON(uur::LevelZero{}, uur::LevelZeroV2{});
 
   // Zero it to begin with since the write may not cover the whole buffer.
   const uint8_t zero = 0x0;