Merge pull request !8068 from zhouyuanshen/gathergrad

Merge pull request !7428 from wuxuejian/cpu_op

Merge pull request !8039 from zhangbuxue/support_key_ward_way_to_pass_arg_for_outermost_net_in_graph_mode

Merge pull request !7381 from zhaoting/master

Merge pull request !8000 from zhouyuanshen/gather

Merge pull request !8055 from MahdiRahmaniHanzaki/tree-getters

Merge pull request !8054 from 34bunny/GPU-ScatterUpdate

Merge pull request !8006 from danishnxt/SegMax

Merge pull request !7933 from Jamie/CacheOp_dev

Merge pull request !8008 from 34bunny/GPU-ScatterAdd

Merge pull request !8003 from JonathanY/repeat_grad

Merge pull request !7796 from lixiachen/cache_c_api_nonmappable

Merge pull request !8013 from liyong126/fix_md_pad

Merge pull request !7693 from wanyiming/add_sigmoid_cross_entropy_with_logit_cpu

Merge pull request !7991 from yihuaijie/dev

Merge pull request !8007 from cathwong/ckw_cppapi_dataset_del_valparms

PyLintFix

header fix

Merge pull request !7873 from tom_chen/sparse_ftrl

Merge pull request !7875 from 34bunny/GPU-SparseApplyProximalAdagrad

Merge pull request !7964 from yuchaojie/quant2

Merge pull request !7914 from Simson/push-to-opensource

Merge pull request !7866 from luoyang/c-api-pyfunc

Merge pull request !7872 from peixu_ren/custom_pp_ops

Merge pull request !7696 from peixu_ren/custom_gpu

Merge pull request !7848 from shenwei41/new_master

update ut

add test case

fix ci

fix ci round 2

address review cmts

Merge pull request !7734 from Alex Yuyue/IR_dataset_input