chore(spans-migration): Make feature flag to rewrite AM1 metric alerts to transactions

Author: nikkikapadia

src/sentry/features/temporary.py

@@ -110,6 +110,8 @@ def register_temporary_features(manager: FeatureManager) -> None:
     manager.add("organizations:migrate-transaction-queries-to-spans", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
     # Enable migration of transaction alerts and queries to spans
     manager.add("organizations:migrate-transaction-alerts-to-spans", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
+    # Enable migration of AM1 metrics alerts to transactions
+    manager.add("organizations:migrate-am1-metrics-alerts-to-transactions", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False)
     # Enable trace-based health checks rule in dynamic sampling
     manager.add("organizations:ds-health-checks-trace-based", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=False, default=False)
     # Enable custom dynamic sampling rates