From: @yangzhenzhang
Reviewed-by: @stsuteng,@kisnwang
Signed-off-by: @stsuteng

From: @joylvliang
Reviewed-by: @chujinjin,@kisnwang
Signed-off-by: @kisnwang

From: @dinglinhe123
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @yangzhenzhang
Reviewed-by: @kisnwang,@stsuteng
Signed-off-by: @stsuteng

From: @kanghui0204
Reviewed-by: 
Signed-off-by:

From: @zhao_ting_v
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by: @wuxuejian

Signed-off-by: kanghui <405194527@qq.com>

From: @dayschan
Reviewed-by: @gaoxiong1,@dylangeng,@gaoxiong1
Signed-off-by: @dylangeng,@dylangeng

1. set class GraphKernel as deprecated, and treat it as Cell
2. set class InplaceAssign as deprecated, suggested using Assign instead.
3. set op_selector as deprecated, removed the _selected_ops and _selected_grad_ops, replaced with real operations
4. removed the two passes of GraphKernel from frontend
5. removed the GraphKernel's codes from other modules

From: @dinglongwei
Reviewed-by: @wuxuejian,@liangchenghui
Signed-off-by: @wuxuejian

From: @zhangzhaoju
Reviewed-by: @zh_qh,@hwhewei,@zh_qh
Signed-off-by: @zh_qh,@zh_qh

From: @hfarahat
Reviewed-by: @robingrosman,@pandoublefeng
Signed-off-by: @robingrosman

From: @hfarahat
Reviewed-by: @nsyca,@mikef,@robingrosman
Signed-off-by: @robingrosman

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

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

From: @laiyongqiang
Reviewed-by: @jjfeing,@majorzhang
Signed-off-by: @majorzhang

From: @xuguoyang5566
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @laiyongqiang
Reviewed-by: @kisnwang,@jjfeing
Signed-off-by: @jjfeing

add single element string tensor support for plugin tensor

Signed-off-by: alex-yuyue <yue.yu1@huawei.com>

From: @cathwong
Reviewed-by: @pandoublefeng,@tom__chen
Signed-off-by: @pandoublefeng

From: @lixiachen
Reviewed-by: @pandoublefeng,@robingrosman
Signed-off-by: @robingrosman

From: @huangbo77
Reviewed-by: @wuxuejian,@oacjiewen
Signed-off-by: @wuxuejian

From: @TFbunny
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @jachua
Reviewed-by: @guoqi1024,@liangchenghui
Signed-off-by: @liangchenghui

From: @yuanwei66
Reviewed-by: @wuxuejian,@c_34
Signed-off-by: @wuxuejian,@c_34