unified-storage: move rvmanager into its own package (#115445)

* unified-storage: move rvmanager into its own package so it can be reused with sqlkv later

pkg/storage/unified/sql/backend.go

@@ -31,6 +31,7 @@ import (
 	"github.com/grafana/grafana/pkg/storage/unified/resourcepb"
 	"github.com/grafana/grafana/pkg/storage/unified/sql/db"
 	"github.com/grafana/grafana/pkg/storage/unified/sql/dbutil"
+	"github.com/grafana/grafana/pkg/storage/unified/sql/rvmanager"
 	"github.com/grafana/grafana/pkg/storage/unified/sql/sqltemplate"
 	"github.com/grafana/grafana/pkg/util/debouncer"
 )
@@ -126,7 +127,7 @@ type backend struct {
 	notifier        eventNotifier
 
 	// resource version manager
-	rvManager *resourceVersionManager
+	rvManager *rvmanager.ResourceVersionManager
 
 	// testing
 	simulatedNetworkLatency time.Duration
@@ -163,7 +164,7 @@ func (b *backend) initLocked(ctx context.Context) error {
 	}
 
 	// Initialize ResourceVersionManager
-	rvManager, err := NewResourceVersionManager(ResourceManagerOptions{
+	rvManager, err := rvmanager.NewResourceVersionManager(rvmanager.ResourceManagerOptions{
 		Dialect: b.dialect,
 		DB:      b.db,
 	})
@@ -928,12 +929,12 @@ func (b *backend) listLatestRVs(ctx context.Context) (groupResourceRV, error) {
 func (b *backend) fetchLatestRV(ctx context.Context, x db.ContextExecer, d sqltemplate.Dialect, group, resource string) (int64, error) {
 	ctx, span := tracer.Start(ctx, "sql.backend.fetchLatestRV")
 	defer span.End()
-	res, err := dbutil.QueryRow(ctx, x, sqlResourceVersionGet, sqlResourceVersionGetRequest{
+	res, err := dbutil.QueryRow(ctx, x, rvmanager.SqlResourceVersionGet, rvmanager.SqlResourceVersionGetRequest{
 		SQLTemplate: sqltemplate.New(d),
 		Group:       group,
 		Resource:    resource,
 		ReadOnly:    true,
-		Response:    new(resourceVersionResponse),
+		Response:    new(rvmanager.ResourceVersionResponse),
 	})
 	if errors.Is(err, sql.ErrNoRows) {
 		return 1, nil