Buildah connection rootless

[sshnaidm]

Support rootless containers with buildah connection
Fixes ansible/ansible#63316

[sshnaidm]

@TomasTomecek can you please take a look? I'd like to have it as a temporary solution for buildah rootless, until I make it work with unshare, if it's possible. Currently unshare mount doesn't work for me well.

[TomasTomecek]

Looks good, worked for me, even with mount:

TASK [Run a sample command] ************************************************************
task path: /home/tt/g/TomasTomecek/ansible-bender/simple-playbook.yaml:21             
Using buildah connection from collection                                              
<fedora-working-container> RUN [b'buildah', b'mount', b'--', b'fedora-working-container']                                                                                    
STDOUT b'/home/tt/.local/share/containers/storage/overlay/06b201fda221beaadcb651869c1f8b191e6ada2dd00bcbc53d7f3809360dffe1/merged\n'
STDERR b''                                                                            
RC CODE 0                                  

Decided to blog about this :D https://blog.tomecek.net/post/ansible-collections/