This PR converts the ad-hoc variables to the new combobox type.
This also allows users to select multiple include filters on the breakdown views using the combobox.
The combobox has not been added to the service selection scene, that will happen in the next PR
Not sure if this has been discussed, but if we're adding the "Indexed" prefix, I would very much rather change the tab name to "Indexed labels" and keep "Labels" in the filters.
Second step of breaking https://github.com/grafana/explore-logs/pull/841 into more manageable chunks.
This PR converts the ad-hoc variables to the new
combobox
type. This also allows users to select multiple include filters on the breakdown views using the combobox. The combobox has not been added to the service selection scene, that will happen in the next PR