Support for model repository revisions

[Muennighoff]

I'm facing some difficulties of using this repository in production due to its limited support for commit strings / revisions. Would it be possible to implement the below two changes:

a) Allow the huggingface revision kwarg to be fed into SentenceTransformer(..) which is then fed into snapshot_download to know for sure a certain model version is downloaded?
b) Not overwrite the default huggingface filename in snapshot_download? By default huggingface seems to keep the revision in the filename. This can then be used to detect the revision downloaded from the environment. Overwriting it with force_filename=relative_filepath causes us to lose this piece of information... :(

Thanks for this amazing repo!

[JohnPaton]

+1, right now I guess the workaround would be to use huggingface to download the model with revision and then load it in sentence-transformers from disk, but it's not really nice.

[tomaarsen]

Implemented in #2419, it will be included in the next release.