[Mosaic:GPU] Remove NVSHMEM usage from Mosaic XLA custom kernel and tests.#38153
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…ests. XLA is deprecating NVSHMEM. Instead of NVSHMEM customers should use NCCL Device API through collective metadata. This change also makes gpu_distributed_test to use collective metadata and fixed inout buffers propagation from MLIR to the XLA. PiperOrigin-RevId: 925359258
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[Mosaic:GPU] Remove NVSHMEM usage from Mosaic XLA custom kernel and tests.
XLA is deprecating NVSHMEM. Instead of NVSHMEM customers should use NCCL Device API through collective metadata.
This change also makes gpu_distributed_test to use collective metadata and fixed inout buffers propagation from MLIR to the XLA.