HA configuration of bundle as part of nightly testing

[mjnagel]

Related to #213 , #715

As part of our nightly testing we should configure our bundle with HA/prod ready configurations. This aligns with the general goal of nightly testing, being more focused on prod-like testing on full infrastructure deployments. A few pieces should be in scope here:

• External dependencies where possible: S3 for Loki/Velero, RDS for Keycloak, Elasticache for Authservice
• Multi-replica setup where possible (Loki/Keycloak are noted gaps currently)

This doc may be a helpful reference for some of the suggested config to test with.

Out of scope for the initial pass:

• Affinity/anti-affinity
• ?

Definition of done: Nightly bundle(s)/configs (currently located here) updated to deploy the required external dependencies and multiple replicas.