fix: convert slot_mapping tensor to array in tpu_model_runner

[juncgu]

fix: convert slot_mapping tensor to ndarray in tpu_model_runner

The slot_mapping tensor of the scheduled_tokens should be converted to an array. The issue was caused by #17483.

FIX #17969

[github-actions]

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[heheda12345]

Thanks for the fix. We have the numpy format tensor in block table. You can just use it.

[heheda12345]

Suggested change

	slot_mapping_cpu[:total_num_scheduled_tokens].numpy())
	slot_mapping_np[:total_num_scheduled_tokens]

[heheda12345]

Close as duplicate with #17971. But still thanks very much for the fix!