Filter workers by type

Depends https://gitlab.com/arkindex/backend/-/issues/989
Depends https://gitlab.com/arkindex/backend/-/issues/988
Refs https://gitlab.com/arkindex/requests/-/issues/628

Once the type filter is available on ListWorkers, we should be able to list all worker types in a select on the workers selection component, and allow a user to filter by a selected type.