Bump Hyrax chart to 0.21.2
Bump Hyrax chart to 0.21.2

Covers:
- Moving `extraInitContainers` to end of `initContainer` section
- Introduction of `skipDbMigrateSeed` value for, optionally, opt-ing out
  of the `db-setup` `initContainer`

samvera/hyrax,samvera/hyrax,samvera/hyrax,samvera/hyrax