[shard_map] fix jax.debug.print/callback under partial auto #25887
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This change makes
jax.debug.print
work under a partial-auto shard_map. I think it's an alternative to #25705 which doesn't need openxla/xla#20944.While this makes
jax.debug.print
work today, corresponding with the semantics of today, #25842 points to deeper improvements we still want to make.