Handle possibly undefined response fields

These are both number | undefined, so we default to 0 if we need a
value. Fixes the type errors resulting from the previous type changes.

x-pack/plugins/timelines/public/hooks/use_status_bulk_action_items.tsx

@@ -57,11 +57,11 @@ export const useStatusBulkActionItems = ({
         // TODO: Only delete those that were successfully updated from updatedRules
         setEventsDeleted({ eventIds, isDeleted: true });
 
-        if (response.version_conflicts > 0 && eventIds.length === 1) {
+        if (response.version_conflicts && eventIds.length === 1) {
           throw new Error(i18n.BULK_ACTION_FAILED_SINGLE_ALERT);
         }
 
-        onUpdateSuccess(response.updated, response.version_conflicts, status);
+        onUpdateSuccess(response.updated ?? 0, response.version_conflicts ?? 0, status);
       } catch (error) {
         onUpdateFailure(status, error);
       } finally {