Work items query support only work_item_type_id field

Background

With [Cells 1.0] Default Work Item Types: Ensure wor... (&15272 - closed) we need to make sure values from work_item_types.id are sequential values 1 - 9. This affects the issues table, as we currently have a foreign key issues.work_item_type_id that relies on these values.

The work items index indexes the work_item_type_id field and will need to adjust to accommodate ensuring work item type IDs are constant sequential 1-9 values.

Proposal

• revert the changes introduced in #501694 (closed)
• change search by_work_item_type_ids filter back to a must (AND) operation to look for only work_item_type_id
  • this will need to be done for both types of options not_work_item_type_ids and work_item_type_ids
• validate search, aggregation, filters work
• Update specs as needed