Fix non-idempotent task touching cideploy known_hosts
Fix non-idempotent task touching cideploy known_hosts

Currently, every run of ansible-runner marks this task as changed
because it always touches the file.

This is a small fix to only create the file if it doesn't exist.
Otherwise, leave it alone.

jamielennox/hoist,SpamapS/hoist,jamielennox/hoist,BonnyCI/hoist,BonnyCI/hoist,SpamapS/hoist