* Update types
* Mark datasource as supporting traces
* Add logic to transform exemplar query to traces query
* Render appropriate editor
* Run trace query for exemplars
* Refactor out common functions
- Add function to retrieve first/default subscription
* Add route for trace exemplars
* Update logic to appropriately query exemplars
* Update traces query builder
* Update instance test
* Remove unneeded import
* Set traces pseudo data source
* Replace deprecated function calls
* Add helper for setting default traces query
* Don't show resource field for exemplars query
* When resetting operation ID for exemplars set query to default
- Update tests
* Update query header to appropriately set the service value
* Fix response frame creation and update tests
* Correctly select resource
* Convert subscriptionsApiVersion to const
* Add feature toggle
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