* optimize tokens count from service accounts query
* add unit tests for tokens count
* skip broken test
* fix lint error
* rename Tokens to TokenCount
* Move TraceQL metrics queries to backend
* Add tests for TransformMetricsResponse
* Add tests for createMetricsQuery
* Refactor, detect metric queries and throw error for search queries
* Remove unneeded types
* Don't add start and end if they are 0. Return on err
* lint
* Fix pre-alloc of frames
* Address PR comments
Mihai Doarna
Andre Pereira