SWDEV-548417 - Fix Memleaks in Graph (#713)

Co-authored-by: Anusha GodavarthySurya <Anusha.GodavarthySurya@amd.com>

projects/hip-tests/catch/unit/graph/hipGraphExecChildGraphNodeSetParams.cc

@@ -305,6 +305,7 @@ TEST_CASE("Unit_hipGraphExecChildGraphNodeSetParams_ChildTopology") {
   HipTest::freeArrays(A_d, B_d, C_d, A_h, B_h, C_h, false);
   HIP_CHECK(hipGraphExecDestroy(graphExec));
   HIP_CHECK(hipGraphDestroy(childgraph1));
+  HIP_CHECK(hipGraphDestroy(childgraph2));
   HIP_CHECK(hipGraphDestroy(graph));
   HIP_CHECK(hipStreamDestroy(streamForGraph));
 }