[Feature] Build an automatically mapping table to download pretrained models.

[KenelmQLH]

Description

(A clear and concise description of what the feature is.)

• Now the name-to-url mapping tables for our pretrained models is defined by a static dict() in T2V , which is too inflexible
• We need to maintain a dynamic mapping tables in modelhub, providing funciton like
  • add model's config(url and T2V) to mapping table when uploading model from Modlhub
  • get model's config(url and T2V) from mapping table when downloading model from EduNLP

    References

• list reference and related literature
• list known implementations