Merge pull request !3135 from VectorSL/cast2

Merge pull request !3080 from vlne-v1/remove-redundant-phi

Merge pull request !3130 from vlne-v1/quant_op_depthwise

Merge pull request !3152 from yao_yf/reshape_ut_remove

Merge pull request !2989 from kisnwang/two-step-reduce-sparse-gradient

Merge pull request !2973 from luoyang/update

Merge pull request !2876 from lirongzhen1/master

Merge pull request !3131 from zhangbuxue/change_shape_and_dtype_of_tensor_from_interface_to_attr

Merge pull request !3144 from nhussain/dataset_check

Merge pull request !3143 from TinaMengtingZhang/dataset-op-ut-mnist

Merge pull request !3077 from ava/invert

Merge pull request !3137 from cathwong/ckw_dataset_ut_cleanup7

Merge pull request !3045 from chenweifeng/sort

Merge pull request !3003 from chenweifeng/broadcastto

Merge pull request !3095 from Simson/push-to-opensource

Merge pull request !3050 from liuxiao93/Tan/TruncateDiv/TruncateMOd

Merge pull request !3083 from zhaoting/master

Merge pull request !3112 from caifubi/data-dump-build

Merge pull request !3049 from liyong126/dataset_save_op

Merge pull request !3111 from peixu_ren/custom_gpu

Merge pull request !3033 from lianliguang/primi-decoupling-v2

Merge pull request !3069 from gziyan/optimizer_parallel_v2

Merge pull request !2966 from laiyongqiang/hcom_memreuse

Merge pull request !3104 from fary86/fix_mstype_eq

python part of random ops

added random select sub policy

validators added

comments added, remaining issues addressed

add more python test cases

fix ci

fix CI

fix order of include files

addr review cmts

addr review cmts

reorg file

fix compile err

address review cmts

address review cmts