teams/asahi: FEX: Minimize rootfs by removing most data files and executables

We only really need i686/x86_64 libraries, and executables which do not exist
(or do not work equivalently) on the arm64 host system.

In particular, removing libexec avoids situations where random dbus services
are started under emulation for no reason.

fex-excludes.yaml

@@ -1,35 +1,15 @@
 exclude:
-- /dev
-- /sys
-- /proc
-- /etc/hosts
-- /etc/resolv.conf
-- /etc/timezone
-- /etc/localtime
-- /etc/passwd
-- /etc/passwd-
-- /etc/group
-- /etc/group-
-- /etc/shadow
-- /etc/shadow-
-- /etc/gshadow
-- /etc/gshadow-
-- /etc/fstab
-- /etc/mtab
-- /etc/subuid
-- /etc/subgid
-- /etc/machine-id
+- /afs
 - /boot
+- /dev
 - /home
 - /media
 - /mnt
-- /root
-- /srv
-- /tmp
-- /run
 - /opt
-- /usr/share/fonts
-- /var/tmp
-- /var/run
-- /var/lock
-- /var/lib/dbus/machine-id
+- /proc
+- /root
+- /run
+- /srv
+- /sys
+- /tmp
+- /var