add support for insecure git repositories

[jstrachan]

via some optional helm property or something?

both the git operator and the Job tends to assume https

[jstrachan]

fixed. The git operator and boot job now properly git clones the supplied URL whether http or https

if using an insecure registry you can now pass in extra git configuration: https://jenkins-x.io/v3/admin/guides/operator/#insecure-git-repositories