* Piotrek's changes for pad3d

* my changes

* first version of pad3d, single copy, unnecessary reads

* optimized pad3d kernel

* test upadte

* removed magic numbers

* added support for pad2d

* reverted two files

* reverted one old change

* added support for Paddings tensor

* CI fix

* CI fix

* fixed timeout of tests

* fixed typo

* changes to GetKernelTypeForVar

* Revert "changes to GetKernelTypeForVar"

This reverts commit 469106115c49682b25038a666fd71bd4a10fb66b.

* added AsExtra() to pad2d
Co-authored-by: NPiotr Paturej <piotr.paturej@intel.com>

* add generate_proposals into paddle.vision

* remove class api

* im_info -> img_size

* change fluid impl to current version

* Rename BOOST_GET macros

* Fix conflicts

* add labels for infer ut

* add RUN_TYPE=INFER for cpp ut

* fix formaterror

* update

* migrate solve kernel to phi

* re useless header file, fix a bug in grad_kernel_impl

* add header file in need

* add yaml for solve op

* fix solve_sig.cc ArgumentMapping and update tests case

* disable legacy dygraph check in op_test

* rm solve_op.cc / solve_sig.cc and migrate yaml config

* Update op_test.py

disable legacy dygraph check when check_eager is True

* shape sum

* add shape, sum trt layer

* add distribute_fpn_proposals

* change to new dygraph

* fix doc and example code

* change fluid impl to current version

* [Plugin] Fix Custom device in eager mode, test=develop

* update test case, test=develop

* update ut for coverage, test=develop

* add xpu resnet_unit
*test=kunlun

* tmp
*test=kunlun

* test

* update

* fix_cast

* fix_cast

* commit

* remove useless code in fc

* reshape fill_constant

* commit

* commit

* draft version

* draft version

* draft version

* migrate solve kernel to phi

* polish

* polish

* re useless header file, fix a bug in grad_kernel_impl

* add header file in need

* transfer as_real to phi

* fix erros

* blocking: True -> False

* eager variable back sync

* remove auto to_pascal_case for args in op generator

* fix yaml config

* update xccl lib
    * use separate streams for compute/comm on XPU
    * add broadcast op to xpu2_op_list

* add custom-op UTs 1

* add authors
Co-authored-by: NAllen Guo <alleng@graphcore.ai>
Co-authored-by: NZhixin Yao <zhixiny@graphcore.ai>
Co-authored-by: NZhaorui Chen <zhaoruic@graphcore.ai>

* update url
Co-authored-by: NZhixin Yao <zhixiny@graphcore.ai>
Co-authored-by: NZhaorui Chen <zhaoruic@graphcore.ai>