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

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

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

@@ -139,6 +139,7 @@ TEST_CASE("Unit_hipGraphNodeGetEnabled_Functional_Basic") {
   HIP_CHECK(hipGraphExecDestroy(graphExec));
   HIP_CHECK(hipGraphDestroy(childGraph));
   HIP_CHECK(hipGraphDestroy(graph));
+  HIP_CHECK(hipEventDestroy(event));
   HipTest::freeArrays(A_d, B_d, C_d, A_h, B_h, C_h, false);
 }