Unbreak ISPRS Potsdam example

[AdeelH]

Overview

The label files in the Potsdam dataset are not georeferenced. Historically, RV had allowed SS label files to be non-georeferenced, but at some point not too long ago, this changed. This broke the ISPRS Potsdam example. This was not caught earlier because the files used during the pre-release testing had been modified to be georeferenced.

This PR makes it so that if the label source is not georeferenced but is the same size as the raster source, RV assumes they are fully aligned. This unbreaks the ISPRS Potsdam example.

Checklist

• Added unit tests, if applicable
• Updated documentation, if applicable
• Added needs-backport label if the change should be back-ported to the previous release
• PR has a name that won't get you publicly shamed for vagueness

Notes

N/A

Testing Instructions

This was tested to work on a fresh download of the ISPRS Potsdam dataset.