feat: Make carrier mapping from ppm to existing powerplants configurable

[coroa]

Changes proposed in this Pull Request

Translates hard-coded fueltype/technology to carrier maps like:

powerplant_fueltype_to_technology_carrier:
    Hard Coal: coal/coal
    Lignite: lignite/lignite
    Nuclear: nuclear/uranium
    "Natural Gas/CCGT": CCGT/gas
    "Natural Gas/OCGT": OCGT/gas
    Bioenergy: urban central solid biomass CHP/biomass

In the keys the first item refers to the Fueltype, the second to the Technology column in the values the first one is the technology (carrier of the link) and the second one the primary energy bus carrier.

I must say, i like in general how the right hand-side of the mapping is defined as a technology_carrier or maybe tech_carrier including both the tech and consumed fuel. Maybe that could be standardized and re-used.

Checklist

• I tested my contribution locally and it works as intended.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in config/config.default.yaml.
• Changes in configuration options are documented in doc/configtables/*.csv.
• Sources of newly added data are documented in doc/data_sources.rst.
• A release note doc/release_notes.rst is added. TODO