[WEB-848] fix: issue with parent child relation not being removed from update issue modal.

[prateekshourya29]

Problem

Removing parent from issue edit modal pop up is not removing the parent child relation.

Solution

This was due to the use of SetValue to remove parent_id when we click on the cross icon. Our revalidation mode is set to onChange and due this the above logic was not working and dirtyFields was not showing parent_id as an updated field even if the relation was removed. To fix this, I have updated the logic to use <Controller /> component with its onChange prop to remove the relation.

This PR is linked to WEB-848