[BUG] salt-cloud fix doc on tmp folder info, and FR to disable use of uuid in tmp folder

[amalaguti]

Description
This would be a documentation fix plus feature request
Based on Cloud docs here https://docs.saltstack.com/en/latest/topics/cloud/troubleshooting.html#tmp-is-mounted-as-noexec
The tmp folder used to deploy minion on the instance should be /tmp/.saltcloud

But it's not correct, it's /tmp/.saltcloud-(random uuid)

salt/salt/utils/cloud.py

Line 1446 in 5281b62

tmp_dir = "{}-{}".format(tmp_dir.rstrip("/"), uuid.uuid4())

tmp_dir = "{0}-{1}".format(tmp_dir.rstrip("/"), uuid.uuid4())

Should the docs be updated?

As a feature request, would be nice if this was set using an option, by default enabled, but given the change to the user to not append the uuid.

Setup
Salt: 3001.1

Steps to Reproduce the behavior
Deploy an instance, in my case using AWS EC2 as provider.
use:
salt-cloud -p profile instance_name --keep-tmp

Expected behavior

1. Update documentation to reflect the right information
2. Offer the option to disable the use of uuid

[barbaricyawps]

Just adding my two cents that these should be two separate issues: one for the doc request and one for the feature request.