Add SecureLocalInteropTest to tests.json

src/python/grpcio_tests/tests_aio/tests.json

@@ -1,6 +1,7 @@
 [
   "_sanity._sanity_test.AioSanityTest",
   "interop.local_interop_test.InsecureLocalInteropTest",
+  "interop.local_interop_test.SecureLocalInteropTest",
   "unit.abort_test.TestAbort",
   "unit.aio_rpc_error_test.TestAioRpcError",
   "unit.call_test.TestStreamStreamCall",