Epic: Provide common infrastructure for interacting with cgroups

Summary

There are more and more places were interacting with cgroups is required. Not only in workspace components but in IDE components as well.

Context

The current interaction with cgroups is not really reusable.

Value

Providing a common library would prevent us from having to implement the same functionality over and over again.

Acceptance Criteria

• Create the cgroup library
• Switch workspace components to the library
• Extend IWS with an endpoint that provides resource information that is using this library
• Supervisor uses this endpoint to retrieve resource information. That way the IDE team does not need to mess with linux and workspace implementation details.

Measurement

Workspace components use cgroup library everywhere and grpc endpoint for other components is available

Start by locating the existing cgroup interactions in workspace components, the IWS resource-information endpoint, and the supervisor code that retrieves resource information. Define the shared cgroup library and trace each affected integration before making changes. Done means workspace components use the library, the gRPC endpoint is available, and the supervisor consumes it without Linux or workspace implementation details.