fix: :bug: Fix IDs of 9 countries, using the smallest geometry that contains them

[AndreCNF]

Changes proposed in this Pull Request

Maps 9 countries' ISO Alpha 2 codes to working IDs. These countries would fail otherwise. The new IDs were chosen via a geopandas contains operation, selecting the smallest geometry from get_geom_sitemap that fully contains the country.

e.g.

# load PyPSA Earth's GeoDataFrame
eo_gdf = get_geom_sitemap()
# find the smallest geometry that contains a country
country = failed_countries[0]
country_aws_gdf = naturalearth_gdf.loc[naturalearth_gdf[COUNTRY_ID_COLUMN] == country]
matches_gdf = eo_gdf.loc[eo_gdf.contains(country_aws_gdf.iloc[0].geometry)]
matches_gdf["area"] = matches_gdf.area
matches_gdf.sort_values(by="area", ascending=True, inplace=True)
matches_gdf

Checklist

• [X] I consent to the release of this PR's code under the AGPLv3 license and non-code contributions under CC0-1.0 and CC-BY-4.0.
• [X] I tested my contribution locally and it seems to work fine.
• [ ] Code and workflow changes are sufficiently documented.
• [ ] Newly introduced dependencies are added to envs/environment.yaml and doc/requirements.txt.
• [ ] Changes in configuration options are added in all of config.default.yaml and config.tutorial.yaml.
• [ ] Add a test config or line additions to test/ (note tests are changing the config.tutorial.yaml)
• [ ] Changes in configuration options are also documented in doc/configtables/*.csv and line references are adjusted in doc/configuration.rst and doc/tutorial.rst.
• [ ] A note for the release notes doc/release_notes.rst is amended in the format of previous release notes, including reference to the requested PR.

[AndreCNF]

As comments, do you need these codes for your study?

Yes, we're running models over every country in the world at TransitionZero and we've noticed issues for these 9 countries.

[davide-f]

Many thanks for the contribution! Ready to merge :D congratulations, you will soon be a new contributor to the community :)