python3Packages.libapparmor: fix cross compilation

the previous code was supplying unspliced `python` (as a buildInput)
and `setuptools` (as a nativeBuildInput) all from the same package set.
in the case of
`pkgsCross.aarch64-multiplatform.python3Packages.libapparmor`, that
results in an aarch64 `setuptools` hook attempting to be run on the
(x86_64) build machine.

by going through `callPackage`, we can supply `pkgs.libapparmor` with
spliced versions of these inputs that are suitable for either
buildInputs/nativeBuildInputs/etc.

pkgs/top-level/python-packages.nix

@@ -8433,11 +8433,18 @@ self: super: with self; {
 
   libais = callPackage ../development/python-modules/libais { };
 
-  libapparmor = toPythonModule (
-    pkgs.libapparmor.override {
-      python3Packages = self;
-    }
-  );
+  libapparmor = callPackage (
+    {
+      python,
+      pythonImportsCheckHook,
+      setuptools,
+    }@python3Packages:
+    toPythonModule (
+      pkgs.libapparmor.override {
+        inherit python3Packages;
+      }
+    )
+  ) { };
 
   libarchive-c = callPackage ../development/python-modules/libarchive-c {
     inherit (pkgs) libarchive;