Use custom image for chia

Update test train catalog items

Upgraded catalog item(s)

Document scaling down app on upgrade for snapshot

        This commit upgrades chia, ipfs, minio, plex catalog item(s).

This commit documents change how chart devs can have certain workloads to be scaled down before taking a snapshot of the application's volumes on an upgrade of the application to a newer catalog item version.

Update charts for 21.06

Add metadata to allow automated updates of catalog item(s)

Update plex docker image version