Backport of "vah26{4,5}enc: Do not touch the PTS of output frame" into 1.24
requested to merge gstreamer-backport-bot/gstreamer:mr-6703-backport-into-1.24-h264_h265_pts_dts into 1.24
Backport of !6703 (merged) "vah26{4,5}enc: Do not touch the PTS of output frame".
Commits: