Merge pull request !17742 from yanghaitao/yht_add_option_to_memory_2

Merge pull request !17839 from zyli2020/fix_issue_defect

Merge pull request !12151 from fanrb/unet

2.Optimize slice grad kernel

3.Add Unet GPU Model

Merge pull request !17583 from chujinjin/modiy_log_level_for_pynative

Merge pull request !17987 from limingqi107/actor_runtime

From: @yanghaitao1
Reviewed-by: @ouwenchang,@yelihua
Signed-off-by: @yelihua

From: @ding_fei_fei
Reviewed-by: @xsmq,@zhoufeng54
Signed-off-by: @zhoufeng54

From: @tina_mengting_zhang
Reviewed-by: @ouwenchang,@yelihua,@zhoufeng54,@yelihua,@ouwenchang
Signed-off-by: @zhoufeng54,@ouwenchang

Merge pull request !17819 from ZPaC/master-add-gpu-all-gather-fusion

From: @zengzitao
Reviewed-by: @limingqi107,@ckey_dou
Signed-off-by: @gaoxiong1

From: @john_tzanakakis
Reviewed-by: @nsyca,@mikef
Signed-off-by: @mikef

From: @huaweib
Reviewed-by: @zhoufeng54,@kisnwang
Signed-off-by: @kisnwang

From: @zyli2020
Reviewed-by: @limingqi107,@cristoval
Signed-off-by: @cristoval

From: @hwjiaorui
Reviewed-by: @zhoufeng54,@yuchaojie
Signed-off-by: @yuchaojie

From: @jiang-shuqiang
Reviewed-by: @yelihua,@ouwenchang
Signed-off-by: @ouwenchang

From: @kisnwang
Reviewed-by: @zhoufeng54,@yuchaojie
Signed-off-by: @yuchaojie

From: @VectorSL
Reviewed-by: @limingqi107,@wilfchen
Signed-off-by: @wilfchen

From: @jjfeing
Reviewed-by: 
Signed-off-by:

From: @limingqi107
Reviewed-by: @cristoval,@wilfchen
Signed-off-by: @wilfchen

From: @hwjiaorui
Reviewed-by: @zhoufeng54,@kisnwang
Signed-off-by: @kisnwang

From: @zhoufeng54
Reviewed-by: @yuchaojie,@kisnwang
Signed-off-by: @kisnwang

From: @john_tzanakakis
Reviewed-by: @mikef,@pandoublefeng
Signed-off-by: @pandoublefeng

Signed-off-by: zhoufeng <zhoufeng54@huawei.com>

From: @wilfchen
Reviewed-by: @cristoval,@limingqi107
Signed-off-by:

From: @wilfchen
Reviewed-by: @cristoval,@limingqi107
Signed-off-by: @limingqi107

From: @zhaosida_hw
Reviewed-by: @zhoufeng54,@yuchaojie
Signed-off-by: @yuchaojie