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/wireexts_oss.go

@@ -36,7 +36,6 @@ import (
 	"github.com/grafana/grafana/pkg/services/searchusers"
 	"github.com/grafana/grafana/pkg/services/searchusers/filters"
 	"github.com/grafana/grafana/pkg/services/sqlstore/migrations"
-	"github.com/grafana/grafana/pkg/services/thumbs"
 	"github.com/grafana/grafana/pkg/services/user"
 	"github.com/grafana/grafana/pkg/services/validations"
 	"github.com/grafana/grafana/pkg/setting"
@@ -56,8 +55,6 @@ var wireExtsBasicSet = wire.NewSet(
 	wire.Bind(new(accesscontrol.RoleRegistry), new(*acimpl.Service)),
 	wire.Bind(new(plugins.RoleRegistry), new(*acimpl.Service)),
 	wire.Bind(new(accesscontrol.Service), new(*acimpl.Service)),
-	thumbs.ProvideCrawlerAuthSetupService,
-	wire.Bind(new(thumbs.CrawlerAuthSetupService), new(*thumbs.OSSCrawlerAuthSetupService)),
 	validations.ProvideValidator,
 	wire.Bind(new(validations.PluginRequestValidator), new(*validations.OSSPluginRequestValidator)),
 	provisioning.ProvideService,