* add dump_walk_path  (#193)

* add dump_walk_path; test=develop

* add dump_walk_path; test=develop

* add dump_walk_path; test=develop

* Add multiple CPU communication, parameter query and merging functions, support batch alignment between multiple cards (#194)

* compatible with edge_type of src2dst and src2etype2dst (#195)

* do not merge_feature_shard when using metapath_split_opt (#198)

* support only load reverse_edge (#199)

* refactor GraphTable (#201)

* fix

* fix

* fix code style

* fix code style

* fix test_dataset

* fix hogwild worker

* fix code style

* fix code style

* fix code style

* fix code style

* fix code style.

* fix code style.

---------
Co-authored-by: Ndanleifeng <52735331+danleifeng@users.noreply.github.com>
Co-authored-by: Nqingshui <qshuihu@gmail.com>
Co-authored-by: NWebbley <liwb5@foxmail.com>
Co-authored-by: Nhuwei02 <53012141+huwei02@users.noreply.github.com>

Co-authored-by: seemingwang <zsasuke@qq.com>
Co-authored-by: NDesmonDay <908660116@qq.com>
Co-authored-by: Nseemingwang <seemingwang@users.noreply.github.com>
Co-authored-by: NThunderbrook <a754913769@163.com>
Co-authored-by: Nxuewujiao <105861147+xuewujiao@users.noreply.github.com>
Co-authored-by: Nroot <root@yq01-sys-hic-k8s-v100-box-a225-0693.yq01.baidu.com>
Co-authored-by: NThunderbrook <52529258+Thunderbrook@users.noreply.github.com>
Co-authored-by: Nroot <root@yq01-inf-hic-k8s-a100-ab2-0009.yq01.baidu.com>
Co-authored-by: Nhuwei02 <53012141+huwei02@users.noreply.github.com>
Co-authored-by: Nyaoxuefeng <yaoxuefeng@baidu.com>
Co-authored-by: Nlxsbupt <luoxsbupt@163.com>
Co-authored-by: Nmiaoli06 <106585574+miaoli06@users.noreply.github.com>
Co-authored-by: Nroot <root@yq01-inf-hic-k8s-a100-ab2-0008.yq01.baidu.com>
Co-authored-by: Nchao9527 <33347532+chao9527@users.noreply.github.com>
Co-authored-by: Nqingshui <qshuihu@gmail.com>
Co-authored-by: Nyangjunchao <yangjunchao@baidu.com>

* add slot attr for push sparse op

* add pybind

* remove fleet

* add unittest

* fix

* use iwyu clean include second time, test=develop

* remove REPLACE_ENFORCE_GLOG compile option & add ci rule prohibit LOG(FATAL) using, test=develop

* remove ci test case, test=develop

* replace all LOG(FATAL) & polish message, test=develop

* fix typo, test=develop

* polish error info detail, test=develop

* user can call dataset.set_download_cmd to set its customized download cmd
* add UT to cover this scenario

* add collective communication library in fleet to replace mpi
* test=develop

test=develop

test=develop