[BUG] proxmox salt-cloud driver fails on Proxmox VE 7

[pjcreath]

Description
When attempting to deploy a VM on a Proxmox VE 7 host, the salt-cloud proxmox driver raises an IndexError exception.

This failure is due to a variable name change in Proxmox's apidoc.js that conflicts with the regular expression in the proxmox driver. (See the change in Proxmox here.)

Pull request with fix and tests to follow.

Setup

• salt master (hostname "salt") is running in a container on the Proxmox host.
• Proxmox (hostname "pve") is running on bare metal, on-premises.

/etc/salt/cloud.providers.d/proxmox.conf

proxmox:
  minion:
    master: salt
  user: mysaltuser@pve
  password: notreallythepassword
  url: pve
  driver: proxmox

/etc/salt/cloud.profiles.d/proxmox.conf

ol8:
  provider: proxmox
  pool: mypool
  image: local:vztmpl/oraclelinux-8-official_amd64.tar.gz
  storage: local-zfs
  technology: lxc
  host: pve
  onboot: 1
  pubkey: mypubkey
  ip_address: 192.168.0.222

Steps to Reproduce the behavior
salt-cloud -p -l all ol8 testvm

Excerpt of debug log

...
[INFO    ] Creating Cloud VM testvm
[DEBUG   ] Not authenticated yet, doing that now..
[DEBUG   ] Starting new HTTPS connection (1): pve:8006
[DEBUG   ] https://pve:8006 "POST /api2/json/access/ticket HTTP/1.1" 200 927
[DEBUG   ] get: https://pve:8006/api2/json/cluster/nextid (None)
[DEBUG   ] Starting new HTTPS connection (1): pve:8006
[DEBUG   ] https://pve:8006 "GET /api2/json/cluster/nextid HTTP/1.1" 200 14
[DEBUG   ] Starting new HTTPS connection (1): pve:8006
[DEBUG   ] https://pve:8006 "GET /pve-docs/api-viewer/apidoc.js HTTP/1.1" 200 188669
[ERROR   ] Error creating testvm on PROXMOX

The following exception was thrown when trying to run the initial deployment: 
list index out of range
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/salt/cloud/clouds/proxmox.py", line 655, in create
    data = create_node(vm_, newid)
  File "/usr/lib/python3.6/site-packages/salt/cloud/clouds/proxmox.py", line 867, in create_node
    for prop in _get_properties("/nodes/{node}/lxc", "POST", static_props):
  File "/usr/lib/python3.6/site-packages/salt/cloud/clouds/proxmox.py", line 760, in _get_properties
    _import_api()
  File "/usr/lib/python3.6/site-packages/salt/cloud/clouds/proxmox.py", line 751, in _import_api
    api_json = re_filter.findall(returned_data.text)[0]
IndexError: list index out of range
Error: There was a profile error: Failed to deploy VM

Expected behavior
Successful creation of the VM.

Versions Report

salt --versions-report

Salt Version:
          Salt: 3004.1
 
Dependency Versions:
          cffi: Not Installed
      cherrypy: Not Installed
      dateutil: 2.6.1
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 2.10.1
       libgit2: Not Installed
      M2Crypto: 0.35.2
          Mako: Not Installed
       msgpack: 0.6.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: Not Installed
      pycrypto: Not Installed
  pycryptodome: Not Installed
        pygit2: Not Installed
        Python: 3.6.8 (default, Apr 11 2022, 08:25:52)
  python-gnupg: 0.4.6
        PyYAML: 3.12
         PyZMQ: 19.0.0
         smmap: Not Installed
       timelib: Not Installed
       Tornado: 4.5.3
           ZMQ: 4.3.4
 
System Versions:
          dist: oracle 8.6 
        locale: UTF-8
       machine: x86_64
       release: 5.15.35-1-pve
        system: Linux
       version: Oracle Linux Server 8.6