containerd
api,adaptation,generate: allow setting kernel scheduling policy attributes.
Allow plugins to set container kernel scheduling policy attributes.
This is the corresponding Process.Scheduler OCI Spec field this PR allows adjusting: https://github.com/opencontainers/runtime-spec/blob/524fc0e1b8ab0180e2fc9abd31837a0f4ed1fd6b/specs-go/config.go#L92
This is how Scheduler is defined in the OCI Spec: https://github.com/opencontainers/runtime-spec/blob/524fc0e1b8ab0180e2fc9abd31837a0f4ed1fd6b/specs-go/config.go#L38
And here are the related scheduler policy and flag definitions: https://github.com/opencontainers/runtime-spec/blob/524fc0e1b8ab0180e2fc9abd31837a0f4ed1fd6b/specs-go/config.go#L880
The related NRI types are all straightforward protobuf defined message representations of the corresponding OCI Spec types.
