Push work item FFs to groups

What does this MR do and why?

While working on create workflow for group level work item , I realised two column view was not visible and hence this MR 🙂

Screenshots or screen recordings

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. In rails console enable the experiment fully

   Feature.enable(:namespace_level_work_items)
   Feature.enable(:work_items_mvc_2)

2. Visit any group work items list http://127.0.0.1:3000/groups/flightjs/-/work-items
3. Click the Create epic button.
4. Create an epic and see the final view should be in two column view

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.