fixes for stripping (#52930)

function changed to do in place replacement, should be less expensive even with copy as it avoids 'sub copies', can compose with module_args_copy to create replacement for old behavior

  attempt to fix #52910

* handle lists and subdicts correctly
* added  missing exception case, which was not noticed since 'cleaning' was not working
* added comments to clarify exceptions

test/integration/targets/loop_control/aliases

@@ -0,0 +1 @@
+shippable/posix/group2

test/integration/targets/loop_control/label.yml

@@ -0,0 +1,23 @@
+- name: loop_control/label https://github.com/ansible/ansible/pull/36430
+  hosts: localhost
+  gather_facts: false
+  tasks:
+    - set_fact:
+        loopthis:
+            - name: foo
+              label: foo_label
+            - name: bar
+              label: bar_label
+
+    - name: check that item label is updated each iteration
+      debug:
+        msg: "{{ looped_var.name }}"
+      with_items: "{{ loopthis }}"
+      loop_control:
+        loop_var: looped_var
+        label: "looped_var {{ looped_var.label }}"
+#
+#    - assert:
+#        that:
+#          - "output.results[0]['_ansible_item_label'] == 'looped_var foo_label'"
+#          - "output.results[1]['_ansible_item_label'] == 'looped_var bar_label'"

test/integration/targets/loop_control/runme.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -eux
+
+# user output has:
+#ok: [localhost] => (item=looped_var foo_label) => {
+#ok: [localhost] => (item=looped_var bar_label) => {
+MATCH='foo_label
+bar_label'
+[ "$(ansible-playbook label.yml "$@" |grep 'item='|sed -e 's/^.*(item=looped_var \(.*\)).*$/\1/')" == "${MATCH}" ]
+