argo apps do not take in Github Token for auth

[kurktchiev]

Currently, the github token is not being passed into the argo apps we generate. We should pass it in for both Audit tracking, and so we can support private repositories. This should be relatively easy either as a post Hub install step in porter or with a kyverno mutation (less desired)

[kurktchiev]

More specifically we need another parameter be added to the porter parameter list, as username back-stack does not work when dealing with PATs and internal orgs but requires an actual valid username.