Backport of "ges/videourisource: handle non-1/1 PAR source videos" into 1.20
requested to merge tpm/gstreamer:backport-mr-2423-into-1.20-ges-non-1-1-par-video-auto-layout into 1.20
Backport of !2423 (merged) "ges/videourisource: handle non-1/1 PAR source videos".
Commits:
- 2b943597 ges/videourisource: handle non-1/1 PAR source videos