[#1622] adm: Return non zero return code if metabase upgrade failed

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

cmd/frostfs-adm/internal/modules/metabase/upgrade.go

@@ -28,6 +28,7 @@ const (
 var (
 	errNoPathsFound          = errors.New("no metabase paths found")
 	errNoMorphEndpointsFound = errors.New("no morph endpoints found")
+	errUpgradeFailed         = errors.New("upgrade failed")
 )
 
 var UpgradeCmd = &cobra.Command{
@@ -91,14 +92,19 @@ func upgrade(cmd *cobra.Command, _ []string) error {
 	if err := eg.Wait(); err != nil {
 		return err
 	}
+	allSuccess := true
 	for mb, ok := range result {
 		if ok {
 			cmd.Println(mb, ": success")
 		} else {
 			cmd.Println(mb, ": failed")
+			allSuccess = false
 		}
 	}
-	return nil
+	if allSuccess {
+		return nil
+	}
+	return errUpgradeFailed
 }
 
 func getMetabasePaths(appCfg *config.Config) ([]string, error) {