ref(*): updates for az migration

[vdice]

TODO

• [x] test chart publishing/uploading pipelines off of this branch
• [x] remove charts base url override before merge

[vdice]

This one's ready to go; tested to success, e.g. https://ci.deis.io/job/controller-chart-publish/10/console

[vdice]

Updated with more/helpful echo statements/logging...