alsmost allow replay gain to be configurable

2 jobs for !5 with libvlc-replaygain in 22 minutes and 9 seconds (queued for 15 minutes and 27 seconds)
detached
Status Job ID Name Coverage
  Build
passed #70501
linux kf5-qt5 qt5.12

00:21:33

85.0%
passed #70500
reuse

00:00:36