* fix opencl backend. test=develop

 [Framework] Fix the issue that `CreatePaddlePredictor` method is not safe for multi-thread condition #4014

* add elu act

* fix elu act not find error, test=develop

* fix format.test=develop

* fix int8 model opt error in conv+conv fusion, test=develop

* fix format. test=develop

* test=develop

* [ASCEND] update based on latest engine.h, test=develop

* fix opencl ci random failure, test=develop

* [ASCEND] Add Huawei Ascend310 support, test=develop

* [ASCEND] fix some typos, test=develop

* [ASCEND] address comments and fix opt ci python file, test=develop

* [ASCEND] update based on new ascend env, test=develop

* [ASCEND] update after develop merge, test=develop

* [Core][ARM] Fix beam_search, eltwise_mul supports broadcast and int64_t data type, add print op and kernel, add exeception
test=develop

* Fix the dims of parent idx of the arm kernel of beam_search op

* elementwise_mul supports int64_t data type with broadcasting

* Add print op and kernel for debugging

* Support throwing the exception when the internal error occurs

* Refine while and conditional_block op kernel

* Support the graph optimization on subblocks

* Pass program_desc and block_idx into the kernel of the control flow ops(while/conditional_block/subgraph), and create the RuntimeProgram online, it make it possiable to call the control flow ops recursively

*Add unit test for masked transformer model

* add conv+conv(1x1s1p0) fusion

* fix build and run error

* fix formmat. test=develop

* read-only modification of cppDesc, test=develop

* update io.cc, test=develop

* fix the code style, test=develop

* add opencl valid api for device

* [LITE][BM] modify interpolate if,test=develop

* [LITE][BM] add include math.h, test=develop

* [LITE][XPU] accomodate resnet_cbam

* [LITE][XPU] accomodate content-dnn

* fix pr comments test=develop

* fix pr comments test=develop

* fix pr comments test=develop test=xpu

* fix compilation error, test=develop test=xpu

* [X86] Fix the unit test of slice op
test=develop test=xpu
Co-authored-by: Nhong19860320 <9973393+hong19860320@users.noreply.github.com>

* [NPU] enhance cache offline model, test=develop

* fix flatbuffers build, test=develop

* fix bugs, test=develop

* refactor register mechanism, current so size: 1.20MB. test=develop

* fix KernelRegistry::Global().Create. test=develop

* fix cpplint errors. test=develop

* fix test_subgraph_pass bug. test=develop

* register kernel with target,precision,datalayout combination. test=develop

* fix test_paddle_api no op found bug. test=develop

* enhance comment

* fix lite/kernels/arm/elementwise_compute_test.cc. test=develop

* fix code style

* revert format of unchanged files. test=develop

* fix code format according to cpplint 1.5.1. test=develop

* remove redundant include header. test=develop

* add flatbuffers, test=develop

* fix cmake codes, test=develop

* [LITE][PASS] Add pass for removing uesless reshape2 / squeeze2. test=develop

* [LITE][OPENCL] Fix grid sampler for mali gpu. test=develop

* reduce .so size. test=develop

* compile all targets when LITE_ON_TINY_PUBLISH=OFF

* unordered_map is more convenient when key is customized class

* test=develop

* test=develop,test=coverage, support coverage CI on x86 server

* test=develop,test=coverage, fix the conflict

* test=develop,test=coverage, add target code_coverage

* test=develop,test=coverage, modify the coveralls.cmake

* Add places of int64 and any precision in opt, test=develop