fix: add helper for expected path.Clean behavior (#12068)

current usage of path.Clean returns "." for empty strings
instead we need `""` string as-is, make relevant changes
as needed.

cmd/data-scanner.go

@@ -419,7 +419,13 @@ func (f *folderScanner) scanQueuedLevels(ctx context.Context, folders []cachedFo
 
 		err := readDirFn(path.Join(f.root, folder.name), func(entName string, typ os.FileMode) error {
 			// Parse
-			entName = path.Clean(path.Join(folder.name, entName))
+			entName = pathClean(path.Join(folder.name, entName))
+			if entName == "" {
+				if f.dataUsageScannerDebug {
+					console.Debugf(scannerLogPrefix+" no bucket (%s,%s)\n", f.root, entName)
+				}
+				return errDoneForNow
+			}
 			bucket, prefix := path2BucketObjectWithBasePath(f.root, entName)
 			if bucket == "" {
 				if f.dataUsageScannerDebug {