[Torch] chunk and unsafe chunk (#8718)
[Torch] chunk and unsafe chunk (#8718)

* alternative chunk op was implemented in pytorch frontend. aten::unsafe_chunk was added to op map in pytorch frontend

* chunk was replaced by new one in pytorch frontend. it is faster in 2.5 times

Co-authored-by: Valery Chernov <50ddfba37a1838e5b37af7e209dddcf180bf9c94@deelvin.com>
Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,Laurawly/tvm-1,Laurawly/tvm-1,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,dmlc/tvm,Laurawly/tvm-1