add the wsl connection plugin (#9795)
* add the wsl connection plugin
* move the banner_timeout required paramiko version to its own line
* document the proxy_command required paramiko version
* document the timeout required paramiko version
* simplify the sending of the become_pass value
* add Connection.__init__ type hints
* add MyAddPolicy.missing_host_key type hints
* normalize the Connection._parse_proxy_command replacers dict values to the str type
* add the user_known_hosts_file option
* modify the private_key_file option type to path
(cherry picked from commit 96b493002c)
Co-authored-by: Rui Lopes <rgl@ruilopes.com>
