Feature/Testung: Improve the validator to the google sheet columns ( such as institution_dim_names,spatial_col, time_col and obs_value_col)
By the way, I think we have a validator somewhere in the code. But the four columns in the example of the title of this issue, are not tested yet, as far as I know. The reason is that once we created this issue, see also the old German name. So I guess we have some form of validator implemented.