Add url query when work item modal is open

What does this MR do and why?

Add url query work_item_id so when visiting the issue show page with this url query, the work item modal automatically opens with the work item details. (Acceptance criteria item 6 in #346158 (closed))

Behind feature flag work_items defaulted off.

Screenshots or screen recordings

Screen_Recording_2022-03-30_at_3.44.23_pm

How to set up and validate locally

1. In rails console enable the feature flag

   Feature.enable(:work_items)

2. Visit any issue page such as http://127.0.0.1:3000/h5bp/html5-boilerplate/-/issues/1
3. Create a task item in the description
4. To the left of the task item checkbox, click on the "Convert to work item" icon and create a task type work item
5. Test the MR by clicking on the work item link

MR acceptance checklist

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