fix the implementation of the relative position encoding in conformer, optimize the code of ctc loss

I reformat the code, implement the intermedia ctc with adapter and the ctc decoding.

Cumulative updates. I mainly optimize the shell scripts and support the new benchmarks. It is more friendly to MT researchers (also including me). I also improve the code. Of course, old problems still remain and new problems arise. Just keep coding.

I have wanted to do this for a long time!