Add fuzz test memory leak case

Author: charles-lunarg

tests/framework/data/fuzz_test_minimized_test_cases/clusterfuzz-testcase-minimized-instance_enumerate_fuzzer-6470575830925312

@@ -135,7 +135,9 @@ TEST(BadJsonInput, ClusterFuzzTestCase_6583684169269248) {
     // Nullptr dereference in loader_copy_to_new_str
     execute_instance_enumerate_fuzzer("clusterfuzz-testcase-minimized-instance_enumerate_fuzzer-6583684169269248");
 }
-
+TEST(BadJsonInput, ClusterFuzzTestCase_6470575830925312) {
+    execute_instance_enumerate_fuzzer("clusterfuzz-testcase-minimized-instance_enumerate_fuzzer-6470575830925312");
+}
 TEST(BadJsonInput, ClusterFuzzTestCase_5258042868105216) {
     // Doesn't crash with ASAN or UBSAN
     // Doesn't reproducibly crash - json_load_fuzzer: Abrt in loader_cJSON_Delete