KEP-5517: DRA Node Allocatable Resources alpha2 changes

[pravk03]

• One-line PR description: DRA Node Allocatable Resources update for alpha2

• Issue link: DRA: Node Allocatable Resource Requests #5517

• Other comments:

[k8s-ci-robot]

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[k8s-ci-robot]

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This pull-request has been approved by: pravk03
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[pravk03]

/sig node
/cc @johnbelamaric @liggitt @pohly (for DRA API review)
/cc @dom4ha @macsko (for sig-scheduling)
/cc @tallclair @ffromani @kad (for sig-node)
/cc @ndixita @natasha41575 (for IPPR and PLR integrations)