Fix temporary workaround for File Permission Locks on Windows

[nfb2021]

Windows keeps a file lock on the created pytesmo netCDF file. This prevents the program from a) renaming the file or b) removing it. Both options are required, though, as the pytesmo filename is needed as new filename for the final QA4SM netCDF files with new structure.

For now, under windows, this is circumvented by copying the pytesmo file to a temporary directory and doing file operations on this copy there, instead. Then, in the proper validation output directory, the unused original pytesmo file may be renamed a./o. removed.

This is done here:

qa4sm-reader/src/qa4sm_reader/netcdf_transcription.py

Line 60 in bc04612

if sys.platform.startswith("win"):

This workaround should be fixed