uriplaylistbin: port to uridecodebin3
Rewrite of uriplaylistbin
using uridecodebin3
gapless switch instead of our own (very complicated) implementation.
It relies on the latest gstreamer
fixes, see #268 (comment 2280661) , so I guess we should wait until those reach the CI image so tests can run reliably.
Closes #268 (closed) Closes #193 (closed) Closes #194 (closed)