[AutoParallel] fix grade_merge bug #68664
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PR Category
Auto Parallel
PR Types
Bug fixes
Description
在分布式情况下，梯度tensor可能会分布在不同的device上，所以在optimizer 对梯度做norm前可能需要allgather拿到完整的梯度。考虑到这种情况,需要将符合条件的all_gather op放到optimzier program里。
pcard-73145