fix build_powerplants FuelType

[Tomkourou]

Closes # (if applicable).

Changes proposed in this Pull Request

Removes the Gas transformations in build_powerplants as they don't seem necessary any longer. Tested on Egypt and tutorial countries and works well.

Checklist

• I consent to the release of this PR's code under the AGPLv3 license and non-code contributions under CC0-1.0 and CC-BY-4.0.
• I tested my contribution locally and it seems to work fine.
• Code and workflow changes are sufficiently documented.
• Newly introduced dependencies are added to envs/environment.yaml and doc/requirements.txt.
• Changes in configuration options are added in all of config.default.yaml and config.tutorial.yaml.
• Add a test config or line additions to test/ (note tests are changing the config.tutorial.yaml)
• Changes in configuration options are also documented in doc/configtables/*.csv and line references are adjusted in doc/configuration.rst and doc/tutorial.rst.
• A note for the release notes doc/release_notes.rst is amended in the format of previous release notes, including reference to the requested PR.

[Tomkourou]

Also tested #753. Works with individual countries but not with the tutorial config. Leaving the changes out until #744 is merged.

[pz-max]

Thanks Tom, I think we should not remove the not working part but fix the original logic... see above comments

[Tomkourou]

I have made the changes necessary to the functions so that when Natural Gas is the fuel it will apply OCGT or CCGT instead of steam turbine or combustion engine and when OCGT or CCGT is the tech it will turn the fuel into Natural Gas.

[pz-max]

Also tested #753. Works with individual countries but not with the tutorial config. Leaving the changes out until #744 is merged.

#744 is already merged. Can you clarify?
Let's tackle issue 753 in an separate PR

[pz-max]

Edited.
It looks good. Please consider the mask vs where replacement. This whole != and working principle of .where is a bit confusing. Not sure how you felt.

Can you share a screenshot of how the data looks now with the fixes?

[Tomkourou]

It looks good. Please consider the mask vs where replacement. This whole != and working principle of .where is a bit confusing. Not sure how you felt.

Can you share a screenshot of how it looks now with the fixes?

Before

After

[pz-max]

@Tomkourou thanks. Will be merged after it runs through