[BUG] Test mode for x509.certificate_managed is broken

[stasjok]

Description
x509.certificate_managed state isn't working with test mode enabled. It looks like the problem is with SUSE backport patch 094b347. There is an usage of undefined private_key_args variable. It was probably pulled from some old code.

Error:

     Comment: An exception occurred in this state: Traceback (most recent call last):
                File "/usr/lib/python3.6/site-packages/salt/state.py", line 2402, in call
                  *cdata["args"], **cdata["kwargs"]
                File "/usr/lib/python3.6/site-packages/salt/loader/lazy.py", line 149, in __call__
                  return self.loader.run(run_func, *args, **kwargs)
                File "/usr/lib/python3.6/site-packages/salt/loader/lazy.py", line 1234, in run
                  return self._last_context.run(self._run_as, _func_or_method, *args, **kwargs)
                File "/usr/lib/python3.6/site-packages/contextvars/__init__.py", line 38, in run
                  return callable(*args, **kwargs)
                File "/usr/lib/python3.6/site-packages/salt/loader/lazy.py", line 1249, in _run_as
                  return _func_or_method(*args, **kwargs)
                File "/usr/lib/python3.6/site-packages/salt/loader/lazy.py", line 1282, in wrapper
                  return f(*args, **kwargs)
                File "/usr/lib/python3.6/site-packages/salt/states/x509.py", line 708, in certificate_managed
                  private_key_args.update(managed_private_key)
              NameError: name 'private_key_args' is not defined

Setup
salt-minion-3006.0-150500.4.24.2.x86_64

Steps to Reproduce the behavior

salt-call state.single x509.private_key_managed name=/tmp/test.key
salt-call state.single x509.certificate_managed name=/tmp/test.crt signing_private_key=/tmp/test.key test=true

Expected behavior
No error returned.

Versions Report

salt --versions-report

(Provided by running salt --versions-report. Please also mention any differences in master/minion versions.)

Salt Version:
          Salt: 3006.0

Python Version:
        Python: 3.6.15 (default, Sep 23 2021, 15:41:43) [GCC]

Dependency Versions:
          cffi: 1.13.2
      cherrypy: unknown
      dateutil: Not Installed
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 2.10.1
       libgit2: Not Installed
  looseversion: 1.0.2
      M2Crypto: 0.38.0
          Mako: Not Installed
       msgpack: 0.5.6
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     packaging: 20.3
     pycparser: 2.17
      pycrypto: Not Installed
  pycryptodome: Not Installed
        pygit2: Not Installed
  python-gnupg: Not Installed
        PyYAML: 5.4.1
         PyZMQ: 17.1.2
        relenv: Not Installed
         smmap: Not Installed
       timelib: Not Installed
       Tornado: 4.5.3
           ZMQ: 4.2.3

System Versions:
          dist: opensuse-leap 15.5
        locale: UTF-8
       machine: x86_64
       release: 5.14.21-150500.55.39-default
        system: Linux
       version: openSUSE Leap 15.5