[cherry-pick] Fix build error caused by flatbuffer if the target is tiny_publish, and fix the missing of the attr name of the output scale (#4356)

* [LITE][XPU] 1. Add sequence_unpad kernel for XPU; 2. Bugfix in sequence_unpad kernel for x86, as InferShapeImpl() is now empty in lite/operators/sequence_unpad_op.cc; 3. Refine TargetWrapperXPU; (#4237)

* [Core] Fix the missing of the attr name of the output scale (#4334)

* [NPU] Fix build error caused by flatbuffer if the target is tiny_publish (#4340)
test=develop
Co-authored-by: NCwndmiao <miaotianxiang@baidu.com>