是否支持huggingface T5ForConditionalGenerartion的加速

[czq1999]

[anaivebird]

https://github.com/bytedance/lightseq/tree/t5_support 这个分支上有，还没merge到master

[anaivebird]

导出可以用t5_support分支的lightseq/examples/inference/python/export/huggingface/hf_t5_export.py

推理用：lightseq/examples/inference/python/test/ls_t5.py

编译教程：https://github.com/bytedance/lightseq/blob/master/docs/inference/build.md

[anaivebird]

master分支已支持