decode path before string ops in fileclient

Fixes #27789.

salt/fileclient.py

@@ -212,6 +212,7 @@ class Client(object):
 
         ret = []
 
+        path = salt.utils.locales.sdecode(path)
         path = self._check_proto(path)
         # We want to make sure files start with this *directory*, use
         # '/' explicitly because the master (that's generating the