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58221b4a - Refactor module access to use PyTorch get_submodule / set_submodule (#1590)

Refactor module access to use PyTorch get_submodule / set_submodule (#1590) Co-authored-by: chen, suyue <suyue.chen@intel.com> Co-authored-by: Liang Lv <liang1.lv@intel.com> Co-authored-by: Sun, Xuehao <xuehao.sun@intel.com>