Alerting: Move rule evaluation status logic out of prometheus API and into scheduler (#89141)

* Add health fields to rules and an aggregator method to the scheduler

* Move health, last error, and last eval time in together to minimize state processing

* Wire up a readonly scheduler to prom api

* Extract to exported function

* Use health in api_prometheus and fix up tests

* Rename health struct to status

* Fix tests one more time

* Several new tests

* Handle inactive rules

* Push state mapping into state manager

* rename to StatusReader

* Rectify cyclo complexity rebase

* Convert existing package local status implementation to models one

* fix tests

* undo RuleDefs rename

pkg/services/ngalert/api/api.go

@@ -63,6 +63,7 @@ type API struct {
 	DataProxy            *datasourceproxy.DataSourceProxyService
 	MultiOrgAlertmanager *notifier.MultiOrgAlertmanager
 	StateManager         *state.Manager
+	Scheduler            StatusReader
 	AccessControl        ac.AccessControl
 	Policies             *provisioning.NotificationPolicyService
 	ReceiverService      *notifier.ReceiverService
@@ -115,7 +116,7 @@ func (api *API) RegisterAPIEndpoints(m *metrics.API) {
 	api.RegisterPrometheusApiEndpoints(NewForkingProm(
 		api.DatasourceCache,
 		NewLotexProm(proxy, logger),
-		&PrometheusSrv{log: logger, manager: api.StateManager, store: api.RuleStore, authz: ruleAuthzService},
+		&PrometheusSrv{log: logger, manager: api.StateManager, status: api.Scheduler, store: api.RuleStore, authz: ruleAuthzService},
 	), m)
 	// Register endpoints for proxying to Cortex Ruler-compatible backends.
 	api.RegisterRulerApiEndpoints(NewForkingRuler(