feat(trends): Create a new feature flag (#49125)

Register a new feature flag to be used internally for trends debugging

src/sentry/conf/server.py

@@ -1384,6 +1384,8 @@ SENTRY_FEATURES = {
     "organizations:performance-metrics-backed-transaction-summary": False,
     # Enable new trends
     "organizations:performance-new-trends": False,
+    # Enable debug views for trendsv2 to be used internally
+    "organizations:performance-trendsv2-dev-only": False,
     # Enable consecutive db performance issue type
     "organizations:performance-consecutive-db-issue": False,
     # Enable consecutive http performance issue type

src/sentry/features/__init__.py

@@ -141,6 +141,7 @@ default_manager.add("organizations:performance-mep-bannerless-ui", OrganizationF
 default_manager.add("organizations:performance-mep-reintroduce-histograms", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:performance-new-widget-designs", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:performance-new-trends", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
+default_manager.add("organizations:performance-trendsv2-dev-only", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:performance-metrics-backed-transaction-summary", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
 default_manager.add("organizations:performance-slow-db-issue", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
 default_manager.add("organizations:profiling", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)