Publish chart to G-Research/charts repository

[ljubon]

Checks:

• Create GitHub app required for this process and pass the fingerprint of the created app via comment on this add yunikorn-history-server charts charts#132
  • App created, we have fingerprint too wrNW9GyqMpq4pv1EgXrgwYPweqsHJo2hRzqOMiBYjS8=
• Create the environment invoke-push and add following secrets from created app
  • APP_ID and APP_PRIVATE_KEY are created under invoke-push environment

Goal of this PR is to use official process of publishing charts to G-Research repo https://g-research.github.io/charts/

[ljubon]

The app is created, environment created, G-Research/charts#132 is merged too
We are ready for review/comment 🫡

[dave-gantenbein]

lgtm