Allow users to get the output from VM console logs in Openstack conn.

[micafer]

[micafer]

Use ex_get_console_output:
https://github.com/apache/libcloud/blob/trunk/libcloud/compute/drivers/openstack.py#L1931C9-L1931C30

API reference:
https://docs.openstack.org/api-ref/compute/#show-console-output-os-getconsoleoutput-action

response:

{
    "output": "FAKE CONSOLE OUTPUT\nANOTHER\nLAST LINE"
}