Use push_to_gon_features instead of touching gon directly

app/controllers/projects/issues_controller.rb

@@ -50,7 +50,7 @@ class Projects::IssuesController < Projects::ApplicationController
     real_time_feature_flag = :real_time_issue_sidebar
     real_time_enabled = Gitlab::ActionCable::Config.in_app? || Feature.enabled?(real_time_feature_flag, @project)
 
-    gon.push({ features: { real_time_feature_flag.to_s.camelize(:lower) => real_time_enabled } }, true)
+    push_to_gon_features(real_time_feature_flag, real_time_enabled)
 
     record_experiment_user(:invite_members_version_a)
     record_experiment_user(:invite_members_version_b)

ee/app/controllers/groups/usage_quotas_controller.rb

@@ -23,7 +23,6 @@ class Groups::UsageQuotasController < Groups::ApplicationController
   end
 
   def push_additional_repo_storage_by_namespace_feature_flag
-    additional_repo_storage_by_namespace_flag = :additional_repo_storage_by_namespace
-    gon.push({ features: { additional_repo_storage_by_namespace_flag.to_s.camelize(:lower) => @group.additional_repo_storage_by_namespace_enabled? } }, true)
+    push_to_gon_features(:additional_repo_storage_by_namespace, @group.additional_repo_storage_by_namespace_enabled?)
   end
 end

ee/app/controllers/profiles/usage_quotas_controller.rb

@@ -13,7 +13,6 @@ class Profiles::UsageQuotasController < Profiles::ApplicationController
   end
 
   def push_additional_repo_storage_by_namespace_feature_flag
-    additional_repo_storage_by_namespace_flag = :additional_repo_storage_by_namespace
-    gon.push({ features: { additional_repo_storage_by_namespace_flag.to_s.camelize(:lower) => current_user.namespace.additional_repo_storage_by_namespace_enabled? } }, true)
+    push_to_gon_features(:additional_repo_storage_by_namespace, current_user.namespace.additional_repo_storage_by_namespace_enabled?)
   end
 end