Filtering subtypes of roads in `enrich-lulc` and `recalc-impedance`

[vwvbrand]

An approach to filtering road types in 3d and 4th commands is different:

• enrich-lulc does not burn tertiary roads, filtering them out (specific location in code unknown)
• recalc-impedance does burn tertiary roads, which can be turned off by manual edits in config\stressors.yaml

The best approach would be to provide opportunity to filter types of roads (and potentially other stressors) in both commands.

[Riyad-boop]

Issue 1:
None of the roads were being burnt in, because the list of rasters was overwritten in the rasterize_vector_layers function for lulc_enrichment_wrapper.py. This mistake occured after I added multiprocessing to speed up rasterization processing time. It's now fixed in the commit