KEP 5941: Shared Consumable Capacity

[SchSeba]

• One-line PR description:
  KEP to allow DRA drivers to define parent-scoped shared capacities that are consumed per allocation by related child devices, with scheduler accounting that prevents aggregate over-allocation.

• Issue link:
  DRA: Shared consumable capacities across related devices #5941

• Other comments:

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: SchSeba / name: Sebastian Scheinkman (0c547f7)

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This pull-request has been approved by: SchSeba
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