added perennials and green biorefining in compile_cost_assumptions.py

[BertoGBG]

Closes # (if applicable).

Changes proposed in this Pull Request

This PR added the technology perennials and green biorefining as "perennials gbr". The technology produces additional biogas from perennial crops.
the changes are implemented in compile_cost_assumptions.py via the function add_perennials_gbr (which is structured similarly to add_carbon_capture)

Checklist

• [Y ] Code changes are sufficiently documented; i.e. new functions contain docstrings and further explanations may be given in doc.
• [ Y] Data source for new technologies is clearly stated.
• Newly introduced dependencies are added to environment.yaml (if applicable).
• A note for the release notes doc/release_notes.rst of the upcoming release is included.
• [Y ] I consent to the release of this PR's code under the GPLv3 license.