feat: profiles and integration tests improvments.

Add the udbus variable to be used in `unix bind` rule for dbus.

apparmor.d/profiles-m-r/needrestart-apt-pinvoke

@@ -13,6 +13,8 @@ profile needrestart-apt-pinvoke @{exec_path} {
   include <abstractions/bus/org.freedesktop.login1>
   include <abstractions/consoles>
 
+  capability dac_read_search,
+
   @{exec_path} mr,
 
   @{sh_path}              rix,

apparmor.d/profiles-m-r/qemu-ga

@@ -21,7 +21,7 @@ profile qemu-ga @{exec_path} {
 
   ptrace (read) peer=@{p_systemd},
 
-  unix type=stream addr=@@{hex16}/bus/shutdown/system,
+  unix type=stream addr=@@{udbus}/bus/shutdown/system,
 
   #aa:dbus talk bus=system name=org.freedesktop.login1 label=systemd-logind