enable fasttrack only on o168

we don't need it elsewhere for now, and the apt proxy on the armhf nodes
currently don't allow for it.

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

hosts/common/etc/apt/sources.list

@@ -9,5 +9,3 @@ deb http://security.debian.org/debian-security bullseye-security main contrib no
 
 deb http://deb.debian.org/debian/ bullseye-backports main contrib non-free
 #deb-src http://deb.debian.org/debian/ bullseye-backports main contrib non-free
-
-deb https://fasttrack.debian.net/debian/ bullseye-fasttrack main contrib non-free

hosts/osuosl168-amd64/etc/sources.list

+deb http://deb.debian.org/debian/ bullseye main contrib non-free
+#deb-src http://deb.debian.org/debian/ bullseye main contrib non-free
+
+deb http://deb.debian.org/debian/ bullseye-updates main contrib non-free
+#deb-src http://deb.debian.org/debian/ bullseye-updates main contrib non-free
+
+deb http://security.debian.org/debian-security bullseye-security main contrib non-free
+#deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free
+
+deb http://deb.debian.org/debian/ bullseye-backports main contrib non-free
+#deb-src http://deb.debian.org/debian/ bullseye-backports main contrib non-free
+
+deb https://fasttrack.debian.net/debian/ bullseye-fasttrack main contrib non-free