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a98a839d - Reduce Memory Cost in Flux Training (#9829)

Reduce Memory Cost in Flux Training (#9829) * Improve NPU performance * Improve NPU performance * Improve NPU performance * Improve NPU performance * [bugfix] bugfix for npu free memory * [bugfix] bugfix for npu free memory * [bugfix] bugfix for npu free memory * Reduce memory cost for flux training process --------- Co-authored-by: 蒋硕 <jiangshuo9@h-partners.com> Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>