fix: ensure all report subcommands exit 0 when there is no app

Closes #7454

plugins/builder/subcommands.go

@@ -1,6 +1,8 @@
 package builder
 
 import (
+	"errors"
+
 	"github.com/dokku/dokku/plugins/common"
 )
 
@@ -9,6 +11,10 @@ func CommandReport(appName string, format string, infoFlag string) error {
 	if len(appName) == 0 {
 		apps, err := common.DokkuApps()
 		if err != nil {
+			if errors.Is(err, common.NoAppsExist) {
+				common.LogWarn(err.Error())
+				return nil
+			}
 			return err
 		}
 		for _, appName := range apps {