Replace the_od_bods/data/ with every pipeline run

[KarenJewell]

Is your feature request related to a problem? Please describe.
When the opendata.scot_pipeline is run, the /data folder in the_od_bods repo isn't replaced. This means the data/ folder is completely out of date unless someone manually replaces it.
This causes issues if publishers or sources are removed from the pipeline refresh, but the original aged data files remain in the folder. It also causes compatibility issues on contributors' local machines, especially if there are structural changes to data files expected downstream.

Describe the solution you'd like

• Add a clean up step to the pipeline to nuke all existing csvs before we run all the scripts
• Start committing to the od bods repo as well on the weekly sync to keep it up to date

Describe alternatives you've considered

• Start writing all the csvs to a temp directory that goes away after pipeline run

Additional context
Rejected writing to temp directory because it’s a significant effort, don’t think it’s worth it if we have our eyes on issue OpenDataScotland/the_od_bods#163 already

Originally discussed on slack 21 Oct 2022: https://opendatascotland.slack.com/archives/C02HEHDL8AY/p1666356294060289