chore(edef/users/depot-scan): move to a subdir

Change-Id: If202b466aa0874048e89e0dc270ff14883510131
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1652
Reviewed-by: edef <edef@edef.eu>
Tested-by: BuildkiteCI

users/edef/depot-scan/default.nix

@@ -8,5 +8,5 @@ pkgs.writeShellScriptBin "depot-scan" ''
   attr="''${path//\//.}"
   root="$(git rev-parse --show-toplevel)"
   echo "scanning //$path" >&2
-  nix-instantiate -E "import ${./depot-scan-wrap.nix} {} $root" -A "$attr" -vv 2> >(${pkgs.perl}/bin/perl ${./depot-scan.pl}) >&2
+  nix-instantiate -E "import ${./wrap.nix} $root" -A "$attr" -vv 2> >(${pkgs.perl}/bin/perl ${./depot-scan.pl}) >&2
 ''

users/edef/depot-scan/wrap.nix

@@ -1,7 +1,5 @@
 # this wraps import to override readFile and readDir to trace the files it touches
 # technique inspired by lorri
-{ ... }:
-
 let
 
   global = {