Area(s)

area:container
area:system
area:process

Is your change request related to a problem? Please describe.

At the moment we have 3 different metric attributes representing the cpu.state:

• system.cpu.state
• process.cpu.state
• container.cpu.state

Based on the global flat registry idea it would be nice if we had one single definition for this attribute and then be able to re-use it in the various namespaces.

Describe the solution you'd like

As it is explained at #681 (comment) we could consider merging into one single one called cpu.state similar to the disk.io.direction and network.io.direction.

Describe alternatives you've considered

Maybe the embed concept would be sth to think of here: open-telemetry/build-tools#240

Additional context

No response

cc @open-telemetry/semconv-system-approvers @open-telemetry/semconv-container-approvers @open-telemetry/semconv-k8s-approvers