assert_ocr_exist新增识别任一目标字符功能，解决在wayland下执行python3 manage.py -h报错

[DarkLii]

解决issues：在wayland下执行python3 manage.py -h报错 #52
解决issues：OCR断言希望新增any识别模式，当给多个识别对象时，识别到任意一一个对象存在就算通过 #50

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