pass-wayland: use proper derivation for .withExtensions

The `pass.withExtensions`-function uses `buildEnv` to create a
derivation which contains a `pass`-package and a list of extensions for
it.

However, this function always uses the `pass`-attribute for `buildEnv` which
will break e.g. `passmenu` or `pass show -c` on desktops using Wayland (and
`pass-wayland.withExtensions`) since the default `pass`-package without
support for Wayland's clipboard is used.

This patch replaces the `pass`-attribute in the derivation with
`pass-wayland` to work around this issue.

pkgs/top-level/all-packages.nix

@@ -1113,6 +1113,7 @@ in
 
   pass-wayland = callPackage ../tools/security/pass {
     waylandSupport = true;
+    pass = pass-wayland;
   };
 
   passExtensions = recurseIntoAttrs pass.extensions;