Add support for redis protocol

[brennoo]

so users with tls-enabled redis can connect viarediss:// - also added support for specifying the database

[ScribblerCoder]

Thanks for the PR. If you can please add

• .Values.redis.external.protocol
• .Values.redis.external.database
  in values.yaml and leave them to default values. To guide users who want to enable TLS, and also for helm-docs

[brennoo]

Thanks for the PR. If you can please add

* `.Values.redis.external.protocol`

* `.Values.redis.external.database`
  in values.yaml and leave them to default values. To guide users who want to enable TLS, and also for helm-docs

thanks for the quick review, done

[ScribblerCoder]

LGTM