wireplumber: Create new recipe for policy daemon

wireplumber: Create new recipe for policy daemon

-carve out a new recipe for wireplumber policy, so that it
 can be assigned to the concerned container.
-create new packagegroup-pipewire-base capturing the set of
 packages required to use PipeWire API.
-remove the implicit dependencies between different wireplumber
 recipes, now each of those recipes will have to be included
 in the top level bb file.
-remove the wireplumber-config virtual package.

Bug-AGL: SPEC-4100
Signed-off-by: Ashok Sidipotu <ashok.sidipotu@collabora.com>
Change-Id: I8ff6834c5dae94b75e07a0709c403b5d7f3b274b
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27254
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jenkins Job builder account