feat(alerts): Add new feature flag to enable EAP alerts (#78985)

Author: edwardgou-sentry

Diff for: src/sentry/features/temporary.py

@@ -53,6 +53,8 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:alert-filters", OrganizationFeature, FeatureHandlerStrategy.INTERNAL, api_expose=False)
     # Enables the migration of alerts (checked in a migration script).
     manager.add("organizations:alerts-migration-enabled", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
+    # Enables EAP alerts
+    manager.add("organizations:alerts-eap", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable anomaly detection feature for rollout
     manager.add("organizations:anomaly-detection-rollout", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable anomaly detection charts