Fix oep upload/download

[jnnr]

• [x] Add target rules to make it easier to upload all results
• [x] Fixes the separator in two dataprocessing functions
• [x] Update poetry.lock to get most recent oemoflex
• [ ] Download of resources fails for all if one fails: This remains unresolved.
• [x] scal_costs_efficiencies is empty. Error in upload because type of var_name is numeric, but contains bool. Change type to string.
• [x] scal_power_potential_wind_pv is missing because it is not used to build datapackages. Remove from download list