wind data path is not PLACEHOLDER when pushing to HF

[AUdaltsova]

Describe the bug

In windnet-india repo paths to wind data in data config do not get sanitized (see here). THey are for pv data in pv-india repo and for nwp data in both, so there has to be a function somewhere that's responsible for it but doesn't know to do it for wind.

Expected behavior

data_config.yaml should read

wind_filename: PLACEHOLDER.nc
wind_metadata_filename: PLACEHOLDER.csv

instead of actual paths