Re-enable HandleScatterWithoutConflicts.#115483
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Re-enables calling HandleScatterWithoutConflicts when conflict resolution is not needed. Also changes HandleScatterWithoutConflicts to report an error when a reduction identity cannot be found for sharded implicit batching dimensions, instead of producing incorrect code silently. PiperOrigin-RevId: 897183575
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Re-enable HandleScatterWithoutConflicts.
Re-enables calling HandleScatterWithoutConflicts when conflict resolution is not needed.
Also changes HandleScatterWithoutConflicts to report an error when a reduction identity cannot be found for sharded implicit batching dimensions, instead of producing incorrect code silently.