fix: Use model revision in results folder

[isaac-chung]

Reason for dataset addition: Addresses #618

Changes

New results structure would incorporate model revisions like so:

results
|-- model name
  |-- model revision
    |-- datasetA.json

If the model revision cannot be found in the model (e.g. not loaded from huggingface), then it needs to be supplied to the run method or via the command line arg --model_revision.

Test

Added a test run result with:

mteb -m intfloat/multilingual-e5-base -t BlurbsClusteringS2S.v2

where the latest revision of the model is d13f1b27baf31030b7fd040960d60d909913633f.

[KennethEnevoldsen]

We might want to integrate it with #807 as well. I believe we can now leave get_model_meta() to extract metadata for an arbitrary sentence trf model.

[isaac-chung]

Added points as well.