* add broadcast supporting for elementwise_add

* add broadcast supporting for elementwise_add

* add more tests

* remove the redundant code

* update

* fix place error in unittest

* remove skip.If

* fix npu compile error, test=develop

* [NPU] Support npu kernel for atan and atan_grad op, test=develop

* [NPU] Support npu kernel for atan and atan_grad op, test=develop
Co-authored-by: Nqili93 <qili93@qq.com>

* [NPU] add reduce_prod

* [NPU] delete check_dygraph=False

* [NPU] delete skipIf

* add attrs support or check

* [NPU] delete extra codes for test_reduce_max_op_npu

* [NPU] add attr out_dtype

* add eye npu op

* remove useless headers

* code style

* Update eye_op_npu.cc

* Update eye_op_npu.cc

* remove useless code in test file

* code style check

* change Copyright to 2021

* add test case and do some fix

* fix

* update code

* fix for CI

* return

* fix

* [NPU] Support npu op: (1) cos (2) cos_grad

* Update test_cos_op_npu.py

* Update activation_op_npu.cc

* rm redundant {1}

* Add relu6 and relu6_grad npu op

* fixed pre-commit-config.yaml

* fixed for CI

* first test version

* add test exec;

* add data transfer; test=develop

* add new exec head;

* add memcpy; test=develop

* add python fetch

* add new test

* add graph node; test=develop

* remove useless new executor test; test=develop

* remove gperf dependency; test=develop

* fix compile bugs; test=develop

* remove useless code; test=develop

* remove useless code; test=develop

* add uni test; test=develop

* polish code; test=develop

* polish code; test=develop

* add interpreter cmakefile; test=develop

* remove useless code; test=develop

* replace boost::algorithm::ends_with with self define ends_with function

* remove BOOST macro in certain operators

* remove boost::lexical_cast

* add test for string_helper

* add more test case for string_helper

* modify join_string func and test case

* fix build_strategy_test failed bug

* remove string_helper_test from parallel_UT_rule.py

* add not_equal NPU op

* add not_equal NPU op

* add not_equal NPU op

* add not_equal NPU op

* [NPU] Support npu kernel for assign_value op

* move test_assign_value_op_npu.py into unittests/npu folder

* correce copyright year; add TestAssignApi class using NPUplace in test files

* add crop npu op

* code style check

* update code to remove usless headers

* add testcase and upsate code

* supplement the function of slice

* edit unittest

* strided_slice_op support .

* polish error message.

* polish error message.

* polish code.

* polish unittest.

* polish code.

* polish code

* polish error message.

* support Kunlun2

* support KL2

* support KL2

* support more dim for mul op npu

* update unit test according to reviewer's comment.

* [NPU] add reduce_max

* [NPU] delete skipIf

* [NPU] add atrrs support or check

* [NPU] add attr out_dtype

* [NPU] delete debug codes

* test version of matmul_v2

* added matmul_v2 grad kernel

* minor changes

* minor changes

* minor change for CI approval

* CI fix

* CI fix

* trigger CI

* changes after review, not working yet

* moved ops to anonymous namespaces

* changes after review

* test version of matmul_v2

* added matmul_v2 grad kernel

* minor changes

* minor changes

* minor change for CI approval

* CI fix

* CI fix

* added squeeze and squeeze2 kernels

* CI fix

* CI fix

* CI fix

* disabled tests when compiled with cuda

* added setting format_tag by strides

* added sigmoid BF16 FWD/BWD and gelu BF16 BWD

* changes after review

* Revert "added sigmoid BF16 FWD/BWD and gelu BF16 BWD"

This reverts commit 6e3f76720b545abfcff9f6052b46b73a1e745cae.

* Revert "Merge branch 'matmul_v2_grad' into squeeze2_op"

This reverts commit 06fcf67843a4a7884eccdf67a02a03575e1d4cb8, reversing
changes made to 6e3f76720b545abfcff9f6052b46b73a1e745cae.

* minor change

* added reshape1/2 kernels

* moved some functions into private block

* CI fix

* CI fix

* CI fix

* added expand_v2 bf16/fp32 kernel

* minor change

* CI fix

* added missing test file

* added formatting

* reduced binary size

* CI fix

* [NPU] add clip and clip_grad on NPU, test=develop

* address review comments, test=develop

* update, test=develop

* Support setitem by None index

* remove unreachable code

* Add Checkpoint for set_value_op because add a new attribute

* support ScaleTensor for scale npu kernel

* add more tests for adam npu

* fix compile

* fix unittest

* refine adam optimizer

* [NPU] add NPU ops&uts of compare, test=develop

* testing

* try style-format

* [NPU] update compare_op_npu uts

* [NPU] fix code sytle of test_compare_op_npu.py

This PR add some primitives api related files. Those files are almost empty for the moment, but will be filled later.