Resolve Ammonia/Steel Production Sites

[toniseibold]

[Neuwirth et al] (https://www.sciencedirect.com/science/article/pii/S0196890421012280?via%3Dihub) show that steel and ammonia production in Germany is located at 4-5 sites.

So far the demand is distributed more evenly which leads to an overestimation of the H2 network.

Rules to change:

• build_industrial_energy_demand_per_node_today
• build_industrial_distribution_key