unsupported ops: conditional_block,select_input,tril_triu

[GreatV]

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A clear and concise description of what the bug is.

PaddleOCR 表格识别算法 无法导出onnx

https://github.com/PaddlePaddle/PaddleOCR/blob/main/doc/doc_ch/algorithm_overview.md#3-%E8%A1%A8%E6%A0%BC%E8%AF%86%E5%88%AB%E7%AE%97%E6%B3%95

Informations (please complete the following information):

• Inference engine for deployment: onnx
• Why convert to onnx：
• Paddle2ONNX Version:
• Email/Wechat/Phone:

Screenshots

paddle2onnx --model_dir inference/table_structure_tablemaster_infer --params_filename inference.pdiparams --model_filename inference.pdmodel  --save_file inference/table_structure_tablemaster_infer/best.onnx
[Paddle2ONNX] Start to parse PaddlePaddle model...
[Paddle2ONNX] Model file path: inference/table_structure_tablemaster_infer/inference.pdmodel
[Paddle2ONNX] Paramters file path: inference/table_structure_tablemaster_infer/inference.pdiparams
[Paddle2ONNX] Start to parsing Paddle model...
[Paddle2ONNX] Oops, there are some operators not supported yet, including conditional_block,select_input,tril_triu,
[ERROR] Due to the unsupported operators, the conversion is aborted.
Aborted (core dumped)

Additional context

[Zheng-Bicheng]

这些控制流太多了，不太好做支持，大部分算子在Paddle2.6都删除了