Quickfix AIM R10 region mapping

[dc-almeida]

Left as draft to confirm if update will not break anything on this project (hash change includes multiple commits)
Failed test due to snakemake syntax

[phackstock]

@dc-almeida, just removed snakemake on main since we're (currently) not using it. You can rebase this PR, then the linting should be fine.
Also as a side note, you don't need a PR to check if the common-definitions update will break anything, you can simply run:

nomenclature validate-project .

locally.