Update role files to grant access to chrome-service-stage namespace on hccs01ue1 cluster.

Tasks

• Update data/teams/insights/roles/platform-experience.yml - add view access to new namespace
• Update data/teams/insights/roles/platform-experience-services.yml - add view access to new namespace
• Update data/services/observability/roles/app-sre-osdv4-monitored-namespaces-view.yml - add view access

Acceptance Criteria

• Platform Experience team has view access
• Platform Experience Services team has view access
• Monitoring role has view access for ServiceMonitor scraping

Related Documentation

• docs/platform-users/access/user-management.md