Add additional filters to backend `workItems` GraphQL API to match legacy issues filters, including * [x] Health * [x] Equals (enum value - on track, needs attention, etc) * [x] Wildcard (any/none) * [x] Not Equals (enum value) * [x] Weight * [x] Equals (number) * [x] Not Equals (number) * [x] Wildcard (any/none)