Epic: [Self-Hosted] Scale down Gitpod when not in use

[lucasvaltl]

Summary

Create a way to automatically scale down gitpod when not in use

Context

Some companies will be running Gitpod in a way that aligns with their working hours - e.g. 8am-6pm M-F. Outside of these hours, Gitpod is not used. We should figure out the best way to scale down Gitpod to use minimal resources outside of these time frames

Value

• Has potential to save a lot of $$$ for customers using Self-Hosted

Acceptance Criteria

• Gitpod is able to automatically scale down to minimal resource needs when not actively in use (i.e. workspaces running)
• This scale down should not happen when it is in use (e.g. user wants to run a data science task over night)
• Ideally, this requires little to no input or involvement from the user.

Measurement

• Cost of running the Gitpod reference architectures should go down significantly

Solution Ideas:

• Allow for scale down node groups for workspaces to 0 when not in use?

Additional Context

• Internal slack thread where this came up

[lucasvaltl]

Duplicate of #12782 - let's keep that ticket for now.