* Alerting: Support concurrent queries for saving alert instances (#70525)
This commit adds support for concurrent queries when saving alert
instances to the database. This is an experimental feature in
response to some customers experiencing delays between rule evaluation
and sending alerts to Alertmanager, resulting in flapping. It is
disabled by default.
(cherry picked from commit 7edbe72483)
* remove changes in api_testing.go
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Co-authored-by: George Robinson <george.robinson@grafana.com>
* Implement backtesting engine that can process regular rule specification (with queries to datasource) as well as special kind of rules that have data frame instead of query.
* declare a new API endpoint and model
* add feature toggle `alertingBacktesting`
Santiago
Yuri Tseretyan