* add new model of MGP-STR
* fix the check failings
* remove torch and numpy from mgp_tokenization
* remove unused import from modeling_mgp_str
* add test_processing_mgp_str
* rm test_processing_mgp_str.py
* add test_processing_mgp_str
* add test_processing_mgp_str
* add test_processing_mgp_str
* rm test_processing_mgp_str and add softmax outs to model
* rm test_processing_mgp_str and add softmax outs to model
* rewrite the code of mgp-str according to PR suggestions
* rewrite the code of mgp-str according to PR suggestions
* add new model of MGP-STR
* fix the check failings
* remove torch and numpy from mgp_tokenization
* remove unused import from modeling_mgp_str
* add test_processing_mgp_str
* rm test_processing_mgp_str.py
* add test_processing_mgp_str
* add test_processing_mgp_str
* add test_processing_mgp_str
* rm test_processing_mgp_str and add softmax outs to model
* rewrite the code of mgp-str according to PR suggestions
* rewrite the code of mgp-str according to PR suggestions
* remove representation_size from MGPSTRConfig
* reformat configuration_mgp_str.py
* format test_processor_mgp_str.py
* add test for tokenizer and complete model/processer test and model file
* rm Unnecessary tupple in modeling_mgp_str
* reduce hidden_size/layers/label_size in test_model
* add integration tests and change MGPSTR to Mgpstr
* add test for logit values
* reformat test model file
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Co-authored-by: yue kun <yuekun.wp@alibaba-inc.com>
