nixos/binfmt: fix race condition between systemd-tmpfiles and systemd-binfmt

We need to make sure systemd-tmpfiles-setup.service ran before we
start systemd-binft.service. Otherwise it might fail to start
due to non-existant files

Fixes #295365

nixos/modules/system/boot/binfmt.nix

@@ -331,6 +331,7 @@ in {
           "proc-sys-fs-binfmt_misc.mount"
           "systemd-binfmt.service"
         ];
+        services.systemd-binfmt.after = [ "systemd-tmpfiles-setup.service" ];
         services.systemd-binfmt.restartTriggers = [ (builtins.toJSON config.boot.binfmt.registrations) ];
       })
     ];