fix bugs in mp_layers、pp_layers and HybridParallelClipGrad #36144
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PR types
Bug fixes
PR changes
APIs
Describe
1、fix bugs in mp_layers.py by value assignment of 'is_distributed' according to mp_degree.
2、fix bugs in pp_layers.py by add attribute (is_firstly_shared) for params in SharedLayerDesc.
3、fix bugs in HybridParallelClipGrad of hybrid_parallel_optimizer.py and add the unittest in pipeline parallel. (PR-36237)
修改bug后单卡和多卡使用ClipGradByGlobalNorm剪枝策略后的loss曲线对齐结果:
单卡与2路mp

单卡与2路pp

单卡与2路mp2路pp
