Replace bioenergy stores with generators

[cpschau]

As the Generator component is extended in PyPSA PR #1047, it can replace the bioenergy Store components. The extension of the Generator allows for a more efficient representation of finite resources, such as biomass, by eliminating the need for storage consistency constraints. Additionally, the desired model behavior to enforce the use of unsustainable bioenergy types is addressed through the new e_sum_min attribute.

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.