Updates Grafana Alertmanager to work with new interface from grafana/alerting#161. This change stops passing user-defined templates to the Grafana Alertmanager by persisting them to disk and instead passes them by string.
* Add single receiver method
* Add receiver permissions
* Add single/multi GET endpoints for receivers
* Remove stable tag from time intervals
See end of PR description here: https://github.com/grafana/grafana/pull/81672
* Create locking config store that mimics existing provisioning store
* Rename existing receivers(_test).go
* Introduce shared receiver group service
* Fix test
* Move query model to models package
* ReceiverGroup -> Receiver
* Remove locking config store
* Move convert methods to compat.go
* Cleanup
* update to alerting 20230418161049-5f374e58cb32
* rename renamed structs in https://github.com/grafana/alerting/pull/73
* update ValidateContactPoint to use BuildReceiverConfiguration
* update logger factory according to changes
* rewrite integration builder
Co-authored-by: Santiago <santiagohernandez.1997@gmail.com>
* replace receiver errors with one from alerting
* add the converter to alerting models
* update buildReceiverIntegration to accept GrafanaReceiver
---------
Co-authored-by: George Robinson <george.robinson@grafana.com>
