Create many view groups (#15591)

# Introduction
Same as https://github.com/twentyhq/twenty/pull/15576 but for view
groups creation

When creating a kanban view with v2 flag activated in production result
in race condition due to request being slow and //.
That's why we're introducing a batch create on view group here
closing https://github.com/twentyhq/core-team-issues/issues/1847

## In v2
- batch create view group endpoint is available
- frontend will target the new endpoint

## In v1
- batch create view group endpoint is not available
- frontend will stick to old fake batch view group creation loop


## Gallery
### v2
<img width="1796" height="486" alt="image"
src="https://github.com/user-attachments/assets/932cfe9f-85f1-41cc-a1c4-72a4b5d5a256"
/>

### v1
<img width="1852" height="966" alt="image"
src="https://github.com/user-attachments/assets/8aa9df11-cdea-4b12-ae60-118cdf5e257b"
/>

packages/twenty-server/test/integration/rest/suites/__snapshots__/view-group.integration-spec.ts.snap

@@ -32,7 +32,7 @@ exports[`View Group REST API POST /metadata/viewGroups should fail to create vie
       },
     ],
   },
-  "message": "Multiple validation errors occurred while creating view group",
+  "message": "Multiple validation errors occurred while creating view groups",
   "statusCode": 400,
   "summary": {
     "invalidCronTrigger": 0,