stdenv setup: Always use both propagated files

This continues #23374, which always kept around both attributes, by
always including both propagated files: `propgated-native-build-inputs`
and `propagated-build-inputs`. `nativePkgs` and `crossPkgs` are still
defined as before, however, so this change should only barely
observable.

This is an incremental step to fully keeping the dependencies separate
in all cases.

pkgs/development/interpreters/python/wrap.sh

@@ -83,7 +83,7 @@ wrapPythonProgramsIn() {
 
 # Adds the lib and bin directories to the PYTHONPATH and PATH variables,
 # respectively. Recurses on any paths declared in
-# `propagated-native-build-inputs`, while avoiding duplicating paths by
+# `propagated-build-inputs`, while avoiding duplicating paths by
 # flagging the directories it has visited in `pythonPathsSeen`.
 _addToPythonPath() {
     local dir="$1"
@@ -96,7 +96,7 @@ _addToPythonPath() {
     addToSearchPath program_PATH $dir/bin
 
     # Inspect the propagated inputs (if they exist) and recur on them.
-    local prop="$dir/nix-support/propagated-native-build-inputs"
+    local prop="$dir/nix-support/propagated-build-inputs"
     if [ -e $prop ]; then
         local new_path
         for new_path in $(cat $prop); do