generic device does not support quantity

[ChenYi015]

What happened?

When I submit a training job with generic device:

arena submit tfjob \
    ... \
    --device kubernetes.io/batch-cpu=1000 \
    --device kubernetes.io/batch-memory=1024 \
    ...

arena will failed to submit, the error is as follows:

ERRO[0000] failed to validate command args: Invalid device value kubernetes.io/batch-cpu=1k should be a number, refer to amd.com/gpu=1.

What did you expect to happen?

The generic device value should support k8s quantity rather than integer.

Environment

Arena version:

$ arena version
arena: v0.12.0+6c24c79
  BuildDate: 2024-11-11T06:12:45Z
  GitCommit: 6c24c7950d9a959e2577d2c7c278a7c3e0611ec7
  GitTreeState: clean
  GoVersion: go1.23.2
  Compiler: gc
  Platform: darwin/arm64

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