try split lidar and clipping

[rosepearson]

In raw DEM stage split the LiDAR rasterisation and clipping of the raster stages to try reduce instances of 'large memory view errors':

• Make code change
• Update tests
  • Update / create new tests
  • Ensure these tests have the expected behavour
  • Test locally and ensure tests are passing
• Ensure tests passing on GH Actions
• Update documentation
  • Doc strings
  • Wiki
• Update package (version.py & pyproject.toml) version (if needed)