Update FeatureFlag has_internal_id parameters

Backfill ran before 13.0, so update to backfill: false, presence: true

ee/app/models/operations/feature_flag.rb

@@ -9,7 +9,7 @@ module Operations
 
     belongs_to :project
 
-    has_internal_id :iid, scope: :project, init: ->(s) { s&.project&.operations_feature_flags&.maximum(:iid) }, backfill: true, presence: false
+    has_internal_id :iid, scope: :project, init: ->(s) { s&.project&.operations_feature_flags&.maximum(:iid) }
 
     default_value_for :active, true
 

ee/spec/models/operations/feature_flag_spec.rb

@@ -58,7 +58,7 @@ RSpec.describe Operations::FeatureFlag do
       end
     end
 
-    it_behaves_like 'AtomicInternalId', validate_presence: false do
+    it_behaves_like 'AtomicInternalId', validate_presence: true do
       let(:internal_id_attribute) { :iid }
       let(:instance) { build(:operations_feature_flag) }
       let(:scope) { :project }