fix KeyError when delte idx from task_infos #54498
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PR types
Bug fixes
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Description
Pcard-71594
num_workers > 0 训练过程中经常出现如下报错
_task_infos中尝试删除idx时，idx并不存在于task_infos中，从而引起KeyErrordel之前加一个 if 判断（但这不是最好的解决办法，因为 pytorch 代码类似，但应该不会出现这种问题，猜测是_task_infos这个变量在多线程的情况下有隐蔽问题导致）