Upgrade RAWDIR save and load from s3

[peterdudfield]

Detailed Description

Currently RAWDIR has to be local

Context

• for gfs, its good to download the raw files to s3, so the next time the consumer runs, it doesnt need to re download these

Possible Implementation

• use ffspec, or similar, instead of pathlib in https://github.com/openclimatefix/nwp-consumer/blob/main/src/nwp_consumer/internal/repositories/raw_repositories/noaa_s3.py#L131

[peterdudfield]

Actually this might not be needed right now