fix: changed dsr and demand shedding benchmarking

[AndreasHD11]

Closes #622

Changes proposed in this Pull Request

This PR proposes fixing the current benchmarking for dsr and demand shedding. In the VP and TYNDP report data, "demand shedding" is in reality dsr. In MM output, currently demand-side response explicit/implicit goes into demand shedding. However, this should be benchmarked against dsr instead. "Unserved energy" is the same as demand shedding for open-tyndp.

The mapping for MM, tyndp report and VP has been updated. Demand shedding in the power capacity plot has been removed. Unserved energy has been added to the power generation table for MM, and we can now compare our demand shedding with MM. One small fix to the plot has been made as some values for dsr in MM were negative (-0.0001) which led to the value going below the x axis.

Examples new outputs

Notes

1. Most dsr in power generation comes from DE. This is also the case for demand shedding.
2. Our demand shedding is slightly higher than MM. This could be linked to the H2 CCGT finding, as DE also has the most amount of H2 CCGT. So if our H2 CCGT prices are higher than the fixed MM price, then more load shedding in open-tyndp could be taking place compared to MM.

Checklist

• [ x] I tested my contribution locally and it works as intended.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to pixi.toml (using pixi add <dependency-name>).
• Changes in configuration options are added in config/config.default.yaml.
• Changes in configuration options are documented in doc/configtables/*.csv.
• Changes in configuration options are added in config/test/*.yaml.
• The multiple weather/climate years test is passing locally (using pixi run -e open-tyndp tyndp-cyears-test).
• Open-TYNDP SPDX license header added to all touched files.
• For new data sources or versions, these instructions have been followed.
• New rules are documented in the appropriate doc/*.rst files.
• A release note doc/release_notes.rst is added.
• Major features are documented with up-to-date information in README and doc/index.rst.
• Module docstrings added to new Python scripts.

[tgilon]

This does not remove the load from the benchmark (see the figure in the description, in which load is still present). It only removes the mapping.

[daniel-rdt]

Thank you @AndreasHD11 for spotting the issue and for this quick fix! This is looking good, except for the issue with Open-TYNDP load shedding still being listed in the capacity plots as pointed out by @tgilon. I guess you can exclude it here probably.