Merge pull request !21072 from zetongzhao/deserialize_1

Fix FillOperation to_json function

Fix FillOperation to_json function

serialize tensor without testing

fix unity input order bug, next step is to test the tensor serialization

serialize tensor, testing code in tensor_test.cc

change for tensor serialization

changes after review

changes after review

clang-format the files

rename

add string implementation, can handle partial string slices

finish core implementation, added Index object

fix up the logic

add in new SliceOption object, cleaning up tests

- cleanup work on createTensor and Tensor's constructors

new test case

Name change for empty check

remove graphengine changes

concat op

Truncate Pair

concat_op

remove graph engine changes

- Add new CreateTensors

add support for MindRecord and TFRecord
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optimize tensorshape

optimize tensorshape and FlatIndex

TFRecord and MindRecord support for string tensor

Modify mem layout
Add new constructor
Add method Allocate

Change some GetMutableBuffer usages to AllocateBuffer

-replace switch'case by indexing

- Add test case
- Add constructors
- Add getItem string

- Fix bugs
- Add more tests

- Tensor iterator
- asNumpy
- TextFileDataset

- Tensor(Numpy)

- Super > 2D
- Add more test cases for GeneratorDataset

- Change StartAddr to GetBuffer and GetMutableNuffer

- Raise an error if batch is used with strings

Clean-up work

Signed-off-by: Jonathan Yan <jonathan.yan1@huawei.com>

Signed-off-by: leonwanghui <leon.wanghui@huawei.com>