Streamlining auth and fixing compatiblity

[Marc-Pierre-Barbier]

You can no longer create private tokens in gitlab, so to fix this i added pat support.

Here is a summary of the changes:

• When cloning through http the pat is used to avoid prompting the user for password.
• Now when saying no to migrating a repo it actually skips it.
• add --use_push_ssh to clone through http and push through ssh. (very usefull for same host migration)
• Remove tailing spaces
• Match the visibility status of a repository being cloned (instead of everything being private)