Chore: Move tsdbifaces.RequestHandler to plugins.DataRequestHandler (#31897)

* Backend: Move tsdbifaces.RequestHandler to plugins.DataRequestHandler

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/services/alerting/eval_handler_test.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"testing"
 
+	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/services/validations"
-	"github.com/grafana/grafana/pkg/tsdb/tsdbifaces"
 
 	. "github.com/smartystreets/goconvey/convey"
 )
@@ -17,7 +17,7 @@ type conditionStub struct {
 	noData   bool
 }
 
-func (c *conditionStub) Eval(context *EvalContext, reqHandler tsdbifaces.RequestHandler) (*ConditionResult, error) {
+func (c *conditionStub) Eval(context *EvalContext, reqHandler plugins.DataRequestHandler) (*ConditionResult, error) {
 	return &ConditionResult{Firing: c.firing, EvalMatches: c.matches, Operator: c.operator, NoDataFound: c.noData}, nil
 }