Error if a module is found to shadow a reserved keyword (#34649)

* Error if a module is found to shadow a reserved keyword

* Add test for shadowed module

* Bring in functools.wraps for the decorator

* Drop the decorator, make _find_plugin the real function, find_plugin now holds the shadow logic

* Swap order of functions for bottom to top execution order

* Only error for modules

* Add test for loading a lookup plugin that shadows a keyword

test/integration/targets/shadowed_module/aliases

@@ -0,0 +1 @@
+posix/ci/group3

test/integration/targets/shadowed_module/inventory

@@ -0,0 +1 @@
+../../inventory

test/integration/targets/shadowed_module/playbook.yml

@@ -0,0 +1,6 @@
+---
+- hosts: localhost
+  gather_facts: false
+  tasks:
+    - command: whoami
+      tags: foo

test/integration/targets/shadowed_module/playbook_lookup.yml

@@ -0,0 +1,6 @@
+---
+- hosts: localhost
+  gather_facts: false
+  tasks:
+    - debug:
+        msg: "{{ lookup('vars', 'inventory_hostname') }}"

test/integration/targets/shadowed_module/runme.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -ux
+
+OUT=$(ansible-playbook playbook.yml -i inventory -e @../../integration_config.yml "$@" 2>&1 | grep 'ERROR! Module "tags" shadows the name of a reserved keyword.')
+
+if [[ -z "$OUT" ]]; then
+    echo "Fake tags module did not cause error"
+    exit 1
+fi
+
+# This playbook calls a lookup which shadows a keyword.
+# This is an ok situation, and should not error
+ansible-playbook playbook_lookup.yml -i inventory -e @../../integration_config.yml "$@"