Refine evaluation process

[cyyeh]

In the current evaluation process, there are some issues for further refinement

• reproducibility: there is no dvc.lock related file to make sure the pipelines are reproducible in evaluation.(we can directly reference this to spider-benchmark repo; however, if it's not that important as of now, we can skip this right now.)
• evaluation report:
  • adding cost/latency
  • adding pipeline metadata so that we can easily understand what parameters cause the differences among different reports