chore: make generate_index_ts() deterministic (#451)

Fixes googleapis/synthtool#1103
Source-Link: googleapis/synthtool@c3e41da
Post-Processor: gcr.io/repo-automation-bots/owlbot-nodejs:latest@sha256:e37a815333a6f3e14d8532efe90cba8aa0d34210f8c0fdbdd9e6a34dcbe51e96

Author: gcf-owl-bot[bot]

packages/google-cloud-oslogin/src/index.ts

@@ -16,13 +16,13 @@
 // ** https://github.com/googleapis/synthtool **
 // ** All changes to this file may be overwritten. **
 
-import * as v1beta from './v1beta';
 import * as v1 from './v1';
+import * as v1beta from './v1beta';
 
 const OsLoginServiceClient = v1.OsLoginServiceClient;
 type OsLoginServiceClient = v1.OsLoginServiceClient;
 
-export {v1beta, v1, OsLoginServiceClient};
-export default {v1beta, v1, OsLoginServiceClient};
+export {v1, v1beta, OsLoginServiceClient};
+export default {v1, v1beta, OsLoginServiceClient};
 import * as protos from '../protos/protos';
 export {protos};