chore(empty-states): Add feature flag (#68194)

this pr adds a feature flag for the empty state improvements we are
making for the issue stream

closes getsentry/sentry#68192

Author: roggenkemper

src/sentry/conf/server.py

@@ -1637,6 +1637,8 @@ def custom_parameter_sort(parameter: dict) -> tuple[str, int]:
     "organizations:issue-search-allow-postgres-only-search": False,
     # Whether to make a side/parallel query against events -> group_attributes when searching issues
     "organizations:issue-search-group-attributes-side-query": False,
+    # Enable the updated empty state for issues
+    "organizations:issue-stream-empty-state": False,
     # Enable issue stream performance improvements
     "organizations:issue-stream-performance": False,
     # Enabled latest adopted release filter for issue alerts

src/sentry/features/temporary.py

@@ -97,6 +97,7 @@ def register_temporary_features(manager: FeatureManager):
     manager.add("organizations:issue-priority-ui", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:issue-search-allow-postgres-only-search", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:issue-search-group-attributes-side-query", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
+    manager.add("organizations:issue-stream-empty-state", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:issue-stream-performance", OrganizationFeature, FeatureHandlerStrategy.REMOTE)
     manager.add("organizations:large-debug-files", OrganizationFeature, FeatureHandlerStrategy.INTERNAL)
     manager.add("organizations:latest-adopted-release-filter", OrganizationFeature, FeatureHandlerStrategy.REMOTE)