Make parent_idx a dispensable output for beam_search op to support models saved by older paddle version. (#16106)

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- Support setting attr in config
- Support setting dtype and initializer for input in config
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* polish the cast op doc

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* follow comments

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* fix api.spec

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* Enable INT8 ReQuantize OP
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* Clean code
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* Add comments
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* Revert "Clean code"
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This reverts commit a7a49b8aa214f9730cb84e11ea96da564fe4b4d9.

* Modify requantize op test
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* fix requantize UT by moving public function to public test file.
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* Fix test fail due to file address change.
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* Change file address for requantize op.
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* refine recurrent_op
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* remove unnecessary code
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* In some case, the input may have one than one negative value.
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* fix matmul bug
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* MKLDNN: Add UT for conv_transpose_mkldnn op.
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* MKLDNN: Add fuse_bias check UT for conv_transpose_mkldnn op.
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* Revert "Add Event for TensorCopy (#15953)"

This reverts commit 7235fd66.
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* fix CI
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Add Event for TensorCopy 

* fix image_resize annotation

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* fix some typo

* Update nn.py

* Update interpolate_op.cc

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