chore(custom-views): Change feature handler strategy for custom views…

… flag to flagpole (#74986)

title 

api_expose has been changed to True since this flag will be used on the
frontend.

associated [SOA
PR](getsentry/sentry-options-automator#2021)

src/sentry/features/temporary.py

@@ -151,7 +151,7 @@ def register_temporary_features(manager: FeatureManager):
     # Whether to make a side/parallel query against events -> group_attributes when searching issues
     manager.add("organizations:issue-search-group-attributes-side-query", OrganizationFeature, FeatureHandlerStrategy.REMOTE, api_expose=False)
     # Enable custom views features in the issue stream
-    manager.add("organizations:issue-stream-custom-views", OrganizationFeature, FeatureHandlerStrategy.OPTIONS, api_expose=False)
+    manager.add("organizations:issue-stream-custom-views", OrganizationFeature, FeatureHandlerStrategy.FLAGPOLE, api_expose=True)
     # Enable the updated empty state for issues
     manager.add("organizations:issue-stream-empty-state", OrganizationFeature, FeatureHandlerStrategy.REMOTE, api_expose=True)
     # Enable additional platforms for issue stream empty state