[BUG] The nexus module does not work with Python 3

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Description
The nexus module does not work since upgrading minion to 3004.2 the nexus.downloaded state fails with
error "expected bytes-like object".

Setup
Master (3004.2) is running on Ubuntu Server, minion(3004.2) is running on Windows 10 machine.

on-prem machine
VM (Virtualbox, KVM, etc. please specify)
VM running on a cloud service, please be explicit and add details
container (Kubernetes, Docker, containerd, etc. please specify)
or a combination, please be explicit
jails if it is FreeBSD
classic packaging
onedir packaging
used bootstrap to install

Steps to Reproduce the behavior
Run this state with described minion version

downloadtest:
  nexus.downloaded:
    - artifact:
        nexus_url: https://mynexusrepo.com/respository
        repository: 'test'
        packaging: '7z'
        group_id: 'testgrop'
        artifact_id: 'testartifact'
        username: 'user'
        password: 'supersecrect'
        version: '1.0'
    - target_file: C:\Temp\test.7z

Expected behavior
The file should be downloaded without failing.

Versions Report

salt --versions-report

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

Master:

Salt Version:
          Salt: 3004.2

Dependency Versions:
          cffi: Not Installed
      cherrypy: Not Installed
      dateutil: 2.7.3
     docker-py: Not Installed
         gitdb: 2.0.6
     gitpython: 3.0.7
        Jinja2: 2.10.1
       libgit2: 0.28.3
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 0.6.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: Not Installed
      pycrypto: Not Installed
  pycryptodome: 3.6.1
        pygit2: 1.0.3
        Python: 3.8.10 (default, Jun 22 2022, 20:18:18)
  python-gnupg: 0.4.5
        PyYAML: 5.3.1
         PyZMQ: 18.1.1
         smmap: 2.0.5
       timelib: Not Installed
       Tornado: 4.5.3
           ZMQ: 4.3.2

System Versions:
          dist: ubuntu 20.04 focal
        locale: utf-8
       machine: x86_64
       release: 5.4.0-126-generic
        system: Linux
       version: Ubuntu 20.04 focal

Minion

Salt Version:
          Salt: 3004.2

Dependency Versions:
          cffi: 1.14.6
      cherrypy: 18.6.1
      dateutil: 2.8.1
     docker-py: Not Installed
         gitdb: 4.0.7
     gitpython: Not Installed
        Jinja2: 2.10.1
       libgit2: Not Installed
      M2Crypto: Not Installed
          Mako: 1.1.4
       msgpack: 0.6.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: 2.20
      pycrypto: Not Installed
  pycryptodome: 3.10.1
        pygit2: Not Installed
        Python: 3.8.8 (tags/v3.8.8:024d805, Feb 19 2021, 13:18:16) [MSC v.1928 64 bit (AMD64)]
  python-gnupg: 0.4.7
        PyYAML: 5.4.1
         PyZMQ: 19.0.0
         smmap: 4.0.0
       timelib: 0.2.4
       Tornado: 4.5.3
           ZMQ: 4.3.2

System Versions:
          dist:
        locale: cp1252
       machine: AMD64
       release: 2019
        system: Windows
       version: 2019 10.0.17763 SP0 Multiprocessor Free

Additional context
This looks like the same problem mentioned in https://github.com/saltstack/salt/issues/56660. I can provide a pull request applying the same fix to the nexus module.

Start by reproducing the nexus.downloaded state from the supplied YAML on a Windows 10 minion running Salt 3004.2, then compare the failure with the related issue 56660 and its proposed fix. Done means the artifact downloads successfully without the “expected bytes-like object” error; the issue does not name a source file or test to update.

Written by the indexing model from the issue text.

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