Update impact_data.py to work with new version of EMDAT

[luseverin]

Impact data downloaded from EMDAT now come in an updated (2024) format (see https://doc.emdat.be/docs/data-structure-and-content/emdat-public-table/). As some of the columns headers were changed and columns were added/removed, it seems to me that the impact_data.py should be updated in order to work properly with the new version of the data. I think this requires updating the VARNAMES_EMDAT dictionary, and then testing that the rest of the functions in the module work. I have created a new branch (feature/update_emdat_impact_data) and have started updating theVARNAMES_EMDAT dictionary but have not checked yet if the rest of the functions in the module were working.
I would suggest that someone who is used to work with EMDAT data and knows well the impact_data.py have a look and let me know what they think.

[chahank]

This is a good point. One question I had using the module is how we should continue using it. It looks like this module was originally built for one specific use case with tropical cyclones. Would a refactoring of it to be more generic and easier to update the data formats in the future be worth it? I also have written a few methods in a separate project to match hazard events to emdat recorded values which are a bit different from the ones in the module. Probably others have also done so.

I think we can convert this issue to a discussion.