Prepare Helm chart for uploading various repositories

[donovanmuller]

We should implement the necessary tooling and infrastructure to be able to publish the Helm chart to various chart repositories when a release is tagged.

As a start we should support the following repositories:

• via GitHub Pages (see references below)
• via JFrog Artifactory (see references below)

References:

GitHub Pages

• https://helm.sh/docs/topics/chart_repository/#github-pages-example
• https://github.com/helm/hub/blob/master/docs/github.md#github-pages-as-a-repository

JFrog Artifactory

• https://helm.sh/docs/topics/chart_repository/#jfrog-artifactory
• https://www.jfrog.com/confluence/display/JFROG/Helm+Chart+Repositories