GitLab

* Feat: support API "randomwalk_topk" in library

* Feat: use the new API "randomwalk_topk" for PinSAGESampler

* Minor

* Minor

* Refactor: modified codes as checker required

* Minor

* Minor

* Minor

* Minor

* Fix: checking errors in RandomWalkTopk

* Refactor: modified the docstring for randomwalk_topk

* change randomwalk_topk to internal

* fix

* rename

* Minor for pinsage.py

* Feat: support randomwalk and SelectPinSageNeighbors on GPU

Port RandomWalk algorithm on GPU,
and port SelectPinSageNeighbors on GPU.

* Feat: support GPU on python APIs

* Feat: remove perf print information in FrequenchHashmap

* Fix: modified the code format

Modified the code format as task_lint.sh suggested

* Feat: let test script support PinSAGESampler on GPU

Let test script support PinSAGESampler on GPU,
minor of "restart_prob".

* Minor

* Minor

* Minor

* Refactor: use the atomic operations from the array module

* Minor: change the long lines

* Refactor: modified the get_node_types for gpu

* Feat: update the contributor date

* Perf: remove unnecessary stream sync

* Feat: support other random walk

But the non-uniform choice is still not supported.

* Fix: add CUDA switch for random walk
Co-authored-by: Quan Gan <coin2028@hotmail.com>