Merge pull request !1983 from JesseKLee/sampler

Merge pull request !1913 from xiefangqi/xfq_support_coco

2. mod cora and citeseer conversion script

Merge pull request !1874 from h.farahat/string_tensor_updates

- Support accepting Numpy of str as input
- Support batching strings
- Core logic of batch&pad is static
- Make Pad a utility function

Merge pull request !1774 from liyong126/mindrecord_padded_sample

Merge pull request !1849 from yanghaitao/yht_fix_tf_noshuffle

Merge pull request !1808 from Jamie/numsamples

updates

more update

more work

more fixin

post rebase updates

clang formatting

code review recovery

ci fixes

updates

update

update

update

Merge pull request !1725 from xiefangqi/xfq_fix_codex2

Merge pull request !1719 from xiefangqi/xfq_fix_codex

Merge pull request !1701 from fary86/fix_gpu_submodule_name_error

2.Fix core dump of exporting onnx model when device target is 'GPU'
3.Fix numbers of arguments and graph parameters check error
4.Fix log prefix of some files of gpu submodule is error

Merge pull request !1549 from yanghaitao/yht_tfreadop_equal_rows_hang

Merge pull request !1480 from panfengfeng/iterator_gpu_weak_ref

add another test case

typo

merge conflict

another PR changed testing behavior, updated test cases in this commit

added input check for use_sampler

addressed code review comments

fixed pylint, not related to my changes

Merge pull request !1465 from h.farahat/fix_compilation_order

Merge pull request !1308 from h.farahat/string_tensor2

add support for MindRecord and TFRecord
----
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

Merge pull request !1281 from Peilin/splitOp

implementation 99% complete

everything and tested except for repeatable shuffling

tested most basic/typical split usecases

cleanup

some more cleanup

fix CI

more ci fix

more ci fixes

more ci fix

more ci fix

more ci fix

added more tests, fixed some bugs

some more clean up and test cases

added shard/shuffle before split warning/error

addressed code review comments and ci

fixed ci

Merge pull request !1318 from xiefangqi/xfq_fix_batch_log