[XLA:SPMD] Fix scatter index-parallel partitioning issues. #17243
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1. Fix gather/scatter partitioning where operand/updates sharding should be aligned with indices' sharding in index-parallel case. 2. Remove the assumption that gather/scatter index-parallel dim detection returns sorted dims where the dimension correspondence information is lost. PiperOrigin-RevId: 675678391
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[XLA:SPMD] Fix scatter index-parallel partitioning issues.