[Request] Add option to list models starting from certain date

[nambrosini17]

Based on what i've seen from the implementation this should be possible using root_prefix + isoformat_date fragment and leverage s3, and azureblob search by prefix capability.

[nlathia]

Awesome idea! I'd welcome a PR if you're up for it 😄

The only complexity I see is that get_model_versions_path, which is used to list all of the models with a given state, does not currently use the date in its prefix.

So the quickest implementation (which would be the slowest to run) would be to filter results after they are loaded. TO be able to use storage prefix filtering, we'd need to either change how we list models (perhaps to not use the versions/ directory anymore?) or start storing version files with a date prefix.