Previews: remove dashboard previews backend (#66176)

* remove dashboard previews backend

* remove dashboard previews backend

* bring back the migration

* bring back the migration

* bring back the migration

pkg/server/wire.go

@@ -136,8 +136,6 @@ import (
 	teamguardianManager "github.com/grafana/grafana/pkg/services/teamguardian/manager"
 	tempuser "github.com/grafana/grafana/pkg/services/temp_user"
 	"github.com/grafana/grafana/pkg/services/temp_user/tempuserimpl"
-	"github.com/grafana/grafana/pkg/services/thumbs"
-	"github.com/grafana/grafana/pkg/services/thumbs/dashboardthumbsimpl"
 	"github.com/grafana/grafana/pkg/services/updatechecker"
 	"github.com/grafana/grafana/pkg/services/user/userimpl"
 	"github.com/grafana/grafana/pkg/setting"
@@ -176,7 +174,6 @@ var wireBasicSet = wire.NewSet(
 	wire.Bind(new(query.Service), new(*query.ServiceImpl)),
 	bus.ProvideBus,
 	wire.Bind(new(bus.Bus), new(*bus.InProcBus)),
-	thumbs.ProvideService,
 	rendering.ProvideService,
 	wire.Bind(new(rendering.Service), new(*rendering.RenderingService)),
 	routing.ProvideRegister,
@@ -186,7 +183,6 @@ var wireBasicSet = wire.NewSet(
 	localcache.ProvideService,
 	bundleregistry.ProvideService,
 	wire.Bind(new(supportbundles.Service), new(*bundleregistry.Service)),
-	dashboardthumbsimpl.ProvideService,
 	updatechecker.ProvideGrafanaService,
 	updatechecker.ProvidePluginsService,
 	uss.ProvideService,