Apply Plotting API to preprocessing plots

Summary

This MR introduces the following changes

• Set the logger option that the ATLAS style is used as debug.
• Removing ResamplingPlots -> Are covered by the preprocessing_plots.
• Removing generate_process_tag -> Were only used in ResamplingPlots.
• Adding Plotting API to preprocessing_plots.
• Adapting Unit tests.

Relates to the following issues

• Closes #177 (closed). This was an issue with the old ResamplingPlots. Due to removing the function, the unit tests are also removed and therefore there is no problem anymore.

Conformity

• Changelog entry
• Documentation
• Development guidelines
• Style guides