do not list buckets without local quorum (#20852)

ListBuckets() would result in listing buckets
without quorum, this PR fixes the behavior.

cmd/storage-datatypes.go

@@ -101,8 +101,6 @@ type VolsInfo []VolInfo
 // VolInfo - represents volume stat information.
 // The above means that any added/deleted fields are incompatible.
 //
-// The above means that any added/deleted fields are incompatible.
-//
 //msgp:tuple VolInfo
 type VolInfo struct {
 	// Name of the volume.
@@ -110,6 +108,9 @@ type VolInfo struct {
 
 	// Date and time when the volume was created.
 	Created time.Time
+
+	// total VolInfo counts
+	count int
 }
 
 // FilesInfo represent a list of files, additionally