Migrate Internal Minio Installation to P1 sub-chart and Registry1 Image

Currently the default minio setting is an internal minio chart but it requires using the upstream docker image to be functional, similar to other BB packages like mattermost & loki, pull in the P1 minio-instance chart as a sub-chart and ensure it's using registry1 images to deploy the default minio backend

• P1 minio-instance chart KPTd to chart/deps/
• sub-chart conditionally enabled and alias defined
• Registry1 image overridden in sub-chart alias
• default objstoreConfig value updated to use minio.NS.svc:80 endpoint and authentication
• Successful deployment, green pipelines, happy thanos installation!