Merge pull request !20520 from lichen/add_op_AllToAllv

Merge pull request !20411 from gziyan/enable_opt_shard_predict

1) users configure sharding strategies for operators;
2) framework will propagate the strategies from configured-ops to
non-configured ops using BFS;
3) the propagation goal is to minimize redistribution communication
cost;

Merge pull request !16457 from lichen/pipeline_split_adapt_master

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

From: @hanyang001
Reviewed-by: @stsuteng,@yangzhenzhang
Signed-off-by: @stsuteng

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

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

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

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

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: @lichen666
Reviewed-by: @kisnwang,@zhunaipan
Signed-off-by: @zhunaipan