fix(perf): Fix feature flag name (#38283)

Fix feature flag name to match where else it's used.

src/sentry/conf/server.py

@@ -1144,7 +1144,7 @@ SENTRY_FEATURES = {
     # Enable the new native stack trace design
     "organizations:native-stack-trace-v2": False,
     # Enable performance issues
-    "organizations:performance-issue": False,
+    "organizations:performance-issues": False,
     # Enable version 2 of reprocessing (completely distinct from v1)
     "organizations:reprocessing-v2": False,
     # Enable the UI for the overage alert settings

src/sentry/features/__init__.py

@@ -114,7 +114,7 @@ default_manager.add("organizations:performance-chart-interpolation", Organizatio
 default_manager.add("organizations:performance-dry-run-mep", OrganizationFeature, True)
 default_manager.add("organizations:performance-extraneous-spans-poc", OrganizationFeature, True)
 default_manager.add("organizations:performance-frontend-use-events-endpoint", OrganizationFeature, True)
-default_manager.add("organizations:performance-issues", OrganizationFeature)
+default_manager.add("organizations:performance-issues", OrganizationFeature, True)
 default_manager.add("organizations:performance-onboarding-checklist", OrganizationFeature, True)
 default_manager.add("organizations:performance-span-histogram-view", OrganizationFeature, True)
 default_manager.add("organizations:performance-span-tree-autoscroll", OrganizationFeature, True)