varaiblemanager, more efficienet vars file reads (#77570) (#77596)

(cherry picked from commit 2c2a204dc6)

changelogs/fragments/vm_more_efficient.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - variablemanager, more efficient read of vars files

lib/ansible/vars/manager.py

@@ -353,8 +353,7 @@ class VariableManager:
                             try:
                                 play_search_stack = play.get_search_path()
                                 found_file = real_file = self._loader.path_dwim_relative_stack(play_search_stack, 'vars', vars_file)
-                                decrypted_file = self._loader.get_real_file(found_file)
-                                data = preprocess_vars(self._loader.load_from_file(decrypted_file, unsafe=True))
+                                data = preprocess_vars(self._loader.load_from_file(found_file, unsafe=True, cache=False))
                                 if data is not None:
                                     for item in data:
                                         all_vars = _combine_and_track(all_vars, item, "play vars_files from '%s'" % vars_file)