Add sg ops update-images
Created by: daxmc99
This is a first stab at adding some @sourcegraph/cloud-devops specific subcommand to sg
Normally, we put these tools in deployment repos where it feels like they are neglected until they break. Putting them in sg/sg is an attempt to prevent this. Longer-term, sg.config.yaml might even start appearing in our deployment repos to setup tooling (ie `cd deploy-* && sg ops rollback) will rollback the last code change in that cluster.
Goals for this specific subcommand:
- Support automated running in CI
Machines and humans would both be expected end users of
sg ops update-images - Replace Renovate for Sourcegraph images
Fixes https://github.com/sourcegraph/sourcegraph/issues/27036
How to test:
sg ops update-images ~/work/deploy-sourcegraph/base