Send RedisHLL metrics via Snowplow for SaaS namespaces - Phase 1
## Summary
This is the pilot to test a handful of metrics traditionally pulled in SM via Redis with snowplow in SaaS.
### Pilot Metrics
Pilot Metrics are indicated on [this sheet](https://docs.google.com/spreadsheets/d/1JurwXL5xso4BMPNu-SDB9VUiQrLwZ9MV0F9eznzXsT8/edit?usp=sharing) as Priority `1a` and `1b`.
### Status
You can view status of the metrics in this pilot in [this sheet](https://docs.google.com/spreadsheets/d/1JurwXL5xso4BMPNu-SDB9VUiQrLwZ9MV0F9eznzXsT8/edit?usp=sharing).
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