feat(ci-wlan): use wpa_supplicant

tests/ci.nix

@@ -2,12 +2,12 @@
   smoke = import ./smoke/test.nix;
   pseudofiles = import ./pseudofiles/test.nix;
   wlan = import ./wlan/test.nix;
-  pppoe = import ./pppoe/test.nix;
+  pppoe = import ./pppoe/test.nix; #
   jffs2 = import ./jffs2/test.nix;
-  ext4 = import ./ext4/test.nix;
+  ext4 = import ./ext4/test.nix; #
   min-copy-closure =  import ./min-copy-closure/test.nix;
   fennel = import ./fennel/test.nix;
-  tftpboot = import ./tftpboot/test.nix;
-  updown = import ./updown/test.nix;
+  tftpboot = import ./tftpboot/test.nix; #
+  updown = import ./updown/test.nix; #
   inout = import ./inout/test.nix;
 }