prepare_sector_network: reorder buses for dac components

[FabianHofmann]

Change the order of buses (bus0, bus1, ...) for DAC components to meet the convention of the other components: bus0 refers to the electricity bus (input), bus1 to the heat bus (input), 'bus2' to the CO2 atmosphere bus (input), and bus3 to the CO2 storage bus (output).

Why is this helpful?

For many routines in the pypsa statistics module, a convention where the bus0 points to the location (in order to extract local balances) is assumed. With this change, the location of the DAC facilities is properly processed.

Checklist

• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Changed dependencies are added to envs/environment.yaml.
• Changes in configuration options are added in all of config.default.yaml.
• Changes in configuration options are also documented in doc/configtables/*.csv.
• A release note doc/release_notes.rst is added.

[fneum]

I think there is one mistake with the units / efficiencies. Could you double check?

[FabianHofmann]

I made a small test case locally, this works as expected.