[vectra_rux] Migrate Vectra RUX to GA

# Integration GA checklist

### All changes

- [ ] Change follows the [contributing guidelines](https://github.com/elastic/integrations/blob/main/CONTRIBUTING.md)
- [ ] Supported versions of the monitoring target are documented
- [ ] Supported operating systems are documented (if applicable)
- [ ] Integration or [System tests](https://github.com/elastic/elastic-package/blob/master/docs/howto/system_testing.md) exist
- [ ] Documentation exists, to follow documentation updates
- [ ] Fields follow [ECS](https://github.com/elastic/ecs) and [naming conventions](https://www.elastic.co/guide/en/beats/devguide/master/event-conventions.html)
- [ ] At least a manual test with ES / Kibana / Agent has been performed.
- [ ] Required Kibana version set to:
- [ ] Dashboards exists
- [ ] Existing issues closed https://github.com/elastic/integrations/issues?q=is%3Aissue%20state%3Aopen%20label%3AIntegration%3A
- [ ] Agentless if can be supported