KEP-2170: Implement Job Pipeline Framework plugins

[tenzen-y]

What you would like to be added?

We need to implement all plugins for Job Pipeline Framework: https://docs.google.com/presentation/d/1HyEsBa7hxWpIoBXaX6uECiB48FWB85SG1kx15mO8hug/edit#slide=id.g30596bfee76_0_202

• CoScheduling: https://github.com/kubeflow/training-operator/blob/6965c1a92462d46981071748936eb135a4584f3d/pkg/runtime.v2/framework/plugins/coscheduling/coscheduling.go @tenzen-y
• JobSet: https://github.com/kubeflow/training-operator/blob/6965c1a92462d46981071748936eb135a4584f3d/pkg/runtime.v2/framework/plugins/jobset/jobset.go @andreyvelich
• MPI: https://github.com/kubeflow/training-operator/blob/6965c1a92462d46981071748936eb135a4584f3d/pkg/runtime.v2/framework/plugins/mpi/mpi.go
• PlainML: https://github.com/kubeflow/training-operator/blob/6965c1a92462d46981071748936eb135a4584f3d/pkg/runtime.v2/framework/plugins/plainml/plainml.go @tenzen-y
• Torch: https://github.com/kubeflow/training-operator/blob/6965c1a92462d46981071748936eb135a4584f3d/pkg/runtime.v2/framework/plugins/torch/torch.go @andreyvelich

Why is this needed?

We should provide the mechanism to insert the plugin parameters to the JobSet.

Love this feature?

Give it a 👍 We prioritize the features with most 👍

[tenzen-y]

/remove-label lifecycle/needs-triage

[tenzen-y]

/assign @tenzen-y @andreyvelich