Validate modules arg spec fixes (#34477)

* Update validate-modules arg_spec introspection to be faster, by only mocking the imports we explicitly list
* The use of types.MethodType in redhat_subscription wasn't py3 compatible, use partial instead
* Remove argument_spec import hacks, make them errors, we can ignore them with ansible-test
* Enable the --arg-spec flag for validate-modules

lib/ansible/modules/packaging/os/redhat_subscription.py

@@ -231,7 +231,7 @@ import os
 import re
 import shutil
 import tempfile
-import types
+import functools
 
 from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils._text import to_native
@@ -314,7 +314,7 @@ class Rhsm(RegistrationBase):
             else:
                 return default
 
-        cp.get_option = types.MethodType(get_option_default, cp, configparser.ConfigParser)
+        cp.get_option = functools.partial(get_option_default, cp)
 
         return cp