324964b86b
Alerting: Usability adjustments to Loki representation of state history values (#62643)
* Extract label merge, add test file
* Extract error/NoData to first class fields, remove a layer from values
* Include dashUID and panelID as line-level fields
* Drop unnecessary object receiver
* Add tests for stream building
* Drop NoData field from log lines
(cherry picked from commit 9fa28c11c5)
Co-authored-by: Alexander Weaver <weaver.alex.d@gmail.com>