add ascend unittest

Ascendrc

Fix reshape on GE graph

support parsing ascend rank table file

Destroy session first.

Add paddle ascend distribution training supported

Ascendrc add converted op : [range/equal/range/uniform_random/expand/squeeze], fix cast op bug  (#30797)

Ascendrc add converted op : [range/equal/range/uniform_random/expand/squeeze], fix cast op bug 

Merge ascend_optimizer and ascend_parser.

code style

[Feature] Build parser to support distributed training

Pass device_ids info from launch to trainer

Build praser for Hcom* operators

Add distribution supported

* test=develop, fix fleet.metrics(mse, rmse, mae)

Co-authored-by: NseiriosPlus <tangwei12@baidu.com>

* test=develop, add distributed_infer

* rename sendrecv.proto to namespace paddle.distributed

* split ps with distributed

* add save tensor support
Co-authored-by: NseiriosPlus <tangwei12@baidu.com>

* add tensor table

* Simplify the options of spawn based on fleetrun

* polish details

* polish doc details

* set flags_selectedd_gpus for spawn

* add cond for unittest

* Delete test_no_single_process_using_multi_gpus_in_spawn.py

* Update spawn.py

* Update nccl_context.cc