Draft: chore: Define siphon's helm release, start with eventsdot-stg
What
This MR defines a new release for Siphon and sets up a first instance of it within analytics-eventsdot-stg.
Why
This work is geared towards productionizing Siphon for CDC'ing Postgres data into ClickHouse. To that end, we're starting with setting up a producer-only setup to do initial tests.
Links to relevant issues
Related: gitlab-org/analytics-section&16, gitlab-org/analytics-section/siphon#164
Edited by Ankit Bhatnagar