Review Redis example #4690

Expected Behavior

We should provide a validated example of using Redis as an online store.

Current Behavior

There is one Redis example at Predict on an InferenceService with transformer using Feast online feature store shows an example of inference service with feast feature server using Redis on Kubernetes.
The example is outdated, and not perfectly working, according to the developer who raised the request on Slack.

Steps to reproduce

See original message in general Slack channel

Possible Solution

Use the exising example in python-helm-demo which already has Redis as the online store, and update it properly to reduce the need of external resources (e.g. Google Cloud Storage).