Add path for yum on IBM i to PKG_MGRS (#69484)

* Add path for yum on IBM i to PKG_MGRS

On IBM i, yum is installed under the `/QOpenSys/pkgs` prefix, see:
https://bitbucket.org/ibmi/opensource/src/master/docs/yum/#markdown-header-must-know-usage-notes-read-this-after-you-install

* Add changelog fragment

changelogs/fragments/69484-add-path-to-yum-for-ibmi.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - setup - properly detect yum package manager for IBM i.

lib/ansible/module_utils/facts/system/pkg_mgr.py

@@ -37,6 +37,7 @@ PKG_MGRS = [{'path': '/usr/bin/yum', 'name': 'yum'},
             {'path': '/usr/sbin/sorcery', 'name': 'sorcery'},
             {'path': '/usr/bin/rpm-ostree', 'name': 'atomic_container'},
             {'path': '/usr/bin/installp', 'name': 'installp'},
+            {'path': '/QOpenSys/pkgs/bin/yum', 'name': 'yum'},
             ]