* eager variable back sync

* sparse support amp

* EagerAmpAutoCasts support sparse

* Compilation optimization

* [CustomDevice] add custom ccl api

* add ut

* add amp logic in python_C

* fix inplace bug

* split coed gen for eager fluid_generated

* fused_gate_attention manual code in eager

* fix deriv with inplace

* fix double grad bugs

* remove additional file

* fix compat dygraph mode

* fix yaml remove additional yaml

* fix slice double grad error and auto code gen logic error for higher order differentiate

* fix fix_higher_order_deriv

* remove additional include

* fix fix_higher_order_deriv

* fused_gate_attention manual code in eager

* Menual fused_feedforward in eager

* fix test case

* fix init()

* delete test_device_context

* replace CPUDeviceContext with CPUContext

* fix test_scalar

* remove dot_op.cc

* fix compile

* move yaml to phi

* fix undef var error

* fused_gate_attention manual code in eager

* refine

* refine

* refine

* refine

* refine

* refine

* boost::variant -> paddle::variant

* boost::variant.apply_visit -> paddle::visit

* Update pybind_boost_hraders.h

* Fix CINN compilation errors

* Revert FetchResultType

* inplace op without backward supports input of multiple inplace vars

* support inplace without backward in eager mode and fix python_c in eager_fluid

* fix output in yaml

* fix map to const&

* solve conflict v2

* perfect copy

* deal with conflict

* deal with conflict

* fix compile bugs

* fix unittest bugs

* change code format

* deal with conflict

* modify code by review

* fix ce bugs

* fix ce bugs

* add lo

* perfect code format

* deal with conflicts

* rename yaml file

* fix merge conflict

* fix infrt

* add some kernel(csr*dense->csr, dense*dense->csr) of SparseTensor matmul

* fix CI

* fix CI

* fix comment

* fix comment

* fix starganv2

* fix starganv2 stop_gradient end error

* fix edvr_starganv2

* fix mul kernel to fix optional ddx

* fix typo

* change logic for optimize

* modifty

* optimize the backward speed of EinsumOp

* add cache optimizer for einsum op

* EinsumOp: fix new dygraph mode error

* fix bug

* change Cache->InnerCache

* fix code

* fix

* add nan inf utils for einsum op

* add as_extra

* memory optimizer for einsum

* update code

* fix custom op error

* fix code error

* change tensor name

* fix unittest bugs

* modify paddle2onnx cmake

* modify paddle2onnx cmake

* modify export interface

* modify paddle2onnx export

* paddle2onnx add mac windows

* modify paddle2onnx mac windows cmake

* modify paddle2onnx mac windows cmake

* modify paddle2onnx cmake support windows

* modify paddle2onnx cmake support windows

* modify paddle2onnx cmake support windows
Co-authored-by: Nxiegegege <xiege01@baidu.com>

* [Eager] FLAGS_retain_grad set false

* Add FLAGS_retain_grad_ for some tests

* Add FLAGS_retain_grad_ to some tests

* modified set_flags

* modified set_flags

* fix windows-ci and windows-openblas-ci

* import paddle.fluid

* first run accumulation node

* add yaml

* fix infrt compile bugs