Rewritten flax.jax_utils.prefetch_to_device and flax.jax_utils.replicate using jax.device_put #5101
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Description:
Context:
Jax deprecated the ops:
jax.device_put_replicatedandjax.device_put_sharded: https://docs.jax.dev/en/latest/changelog.html#jax-0-8-1-november-18-2025flax.jax_utils.prefetch_to_device is used in ImageNet example and we want re-enable examples tests: #5099
In this PR flax.jax_utils.prefetch_to_device is recoded using
jax.device_put, jax make_mesh and NamedSharding etc to fix deprecation warning. flax.jax_utils.replicate is also recoded.