tech(alerting): set prev state when creating eval context

pkg/services/alerting/eval_context.go

@@ -39,6 +39,7 @@ func NewEvalContext(alertCtx context.Context, rule *Rule) *EvalContext {
 		Logs:           make([]*ResultLogEntry, 0),
 		EvalMatches:    make([]*EvalMatch, 0),
 		log:            log.New("alerting.evalContext"),
+		PrevAlertState: rule.State,
 	}
 }
 

pkg/services/alerting/result_handler.go

@@ -59,8 +59,6 @@ func (handler *DefaultResultHandler) GetStateFromEvaluation(evalContext *EvalCon
 }
 
 func (handler *DefaultResultHandler) Handle(evalContext *EvalContext) error {
-	evalContext.PrevAlertState = evalContext.Rule.State
-
 	executionError := ""
 	annotationData := simplejson.New()