chore: refactor SecretMigrationProviderImpl as a dskit module (#71944)

* chore: refactor SecretMigrationProviderImpl as a dskit service

pkg/modules/registry/registry.go

@@ -10,6 +10,7 @@ import (
 	"github.com/grafana/grafana/pkg/server/backgroundsvcs"
 	grafanaapiserver "github.com/grafana/grafana/pkg/services/grafana-apiserver"
 	"github.com/grafana/grafana/pkg/services/provisioning"
+	"github.com/grafana/grafana/pkg/services/secrets/kvstore/migrations"
 )
 
 type Registry interface{}
@@ -26,6 +27,7 @@ func ProvideRegistry(
 	certGenerator certgenerator.ServiceInterface,
 	httpServer *api.HTTPServer,
 	provisioningService *provisioning.ProvisioningServiceImpl,
+	secretsMigrator *migrations.SecretMigrationProviderImpl,
 ) *registry {
 	return newRegistry(
 		log.New("modules.registry"),
@@ -35,6 +37,7 @@ func ProvideRegistry(
 		certGenerator,
 		httpServer,
 		provisioningService,
+		secretsMigrator,
 	)
 }