mkosi: add libz1 to packages list on opensuse

/usr/lib/systemd/systemd: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory

(cherry picked from commit 6fdd047)
(cherry picked from commit 92433fd)
(cherry picked from commit 2be4f4a)

Author: bluca

mkosi.default.d/opensuse/10-mkosi.opensuse

@@ -26,6 +26,7 @@ Packages=
         libqrencode4
         libseccomp2
         libxkbcommon0
+        libz1
         pam
         tpm2-0-tss
         vim