[Test] (MG_Test, MG_IntegrationTest): assert a destroyed vertex array returns its CSO slot, on the client allocator and on the DirectVulkan lane where it leaked

MobileGL/MG_IntegrationTest/CMakeLists.txt

@@ -52,6 +52,7 @@ add_executable(MobileGLIntegrationTest
     Main.cpp
     Harness/HeadlessGL.cpp
     Harness/BackendCapsPeek.cpp
+    Harness/PipeSlotPeek.cpp
     Scenarios/OrientationScenario.cpp
     Scenarios/CrossFrameBufferScenario.cpp
     Scenarios/ResidentIndexScenario.cpp