[FEATURE REQUEST] Auto generate password for windows in azurerm

[nicholasmhughes]

Copied from Salt issue 56151 opened by @tkykm
saltstack/salt#56151 (comment)

Description of Issue
This is feature request.
It would be great that we can auto generate password for windows In salt-cloud with azurearm like a AWS.
for example, the idea is to set key to profile and then salt-cloud generate a strong password and ecrypt it with the key, finally store it to grain.

Thank you in advance!

Setup
(Please provide relevant configs and/or SLS files (Be sure to remove sensitive info).)
salt 2019.2.2 or more