* enhance get_torchvision_models
* simplify logic
* Dump ckpt in torchvision lower than 0.13.0 to a json file
* add json
* refactor load urls logic
* fix unit test
* change url key to lower letters
* check torchvision version rather than check torch version in unittest
* Fix CI and refine test logic of torchvision version
* add comment
* support compare pre-release version
* support loaad modeel like torchvision
* refine comment.
* fix unit test and comment
* fxi unit test bug
* support get model by lower weights
* Refactor _load_checkpoint fn
* Update _load_checkpoint fn
* Update docs str and add unit test
* Fix unit test
* Fix lint
* Add comment and Optimize function
* Fix docs str
* Update load_ckpt and fix doc str
* Update doc str and add sort unit test
* Update and fix unit test
* Fix unit test
* Update and add unit test
* Fix openmmlab prefix error