Update config for Wireplumber > 0.5

This fixes: apertis-issues#896

• 50-media-role-nodes.conf is based on /usr/share/doc/wireplumber/examples/wireplumber.conf.d/media-role-nodes.conf with a unique change of action (from "mix" to "cork") for streams with a multimedia role with the same priority. This is required for our test-cases hmi-audio-combined and hmi-audio-management-on-same-priority.
• 60-alsa-vm-config.lua was not ported because the bug is unreproducible.