flags(insights): register flag for new frontend page ui (#96850)

Corresponding flagr PR
getsentry/sentry-options-automator#4753

Author: DominikB2014

src/sentry/features/temporary.py

@@ -382,6 +382,8 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:insights-query-date-range-limit", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, api_expose=True)
     # Make Insights overview pages use EAP instead of transactions (because eap is not on AM1)
     manager.add("organizations:insights-modules-use-eap", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
+    # Enable new frontend overview ui (DAIN-154)
+    manager.add("organizations:insights-frontend-overview-new-ui", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable open in explore and create alert actions inside insight charts
     manager.add("organizations:insights-chart-actions", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable access to insights metrics alerts