xla

7b92a949 - Refactor ExecuteReplicated to operate on sharded data directly (#5737)

Refactor ExecuteReplicated to operate on sharded data directly (#5737) * Refactor ExecuteReplicated to operate on sharded data directly * Remove old handlers * formatting * Improve naming and logging * update docstring * Remove obsolete unit tests * improve comment * Remove slow calls to get output shapes. * fix implicit sharding * remove declarations of input/output handlers * formatting * give everything a manual placeholder sharding * see if CI passes * formatting * Shard parameter and output handling * Use absl::BlockingCounter * formatting * fix merge * Assign valid output shardings * tune and document costs * formatting * implicitly replicate output to match outputhandler * clarify ReplicateShardedData * fix merge