[PR #8713/0f59bb7a backport][stable-9] Get interfaces for Proxmox LXC containers (#8750)

Get interfaces for Proxmox LXC containers (#8713)

* Get interfaces for Proxmox LXC containers

* Add changelog

* Don't use bare except

* Update changelog from suggestion

Co-authored-by: Felix Fontein <felix@fontein.de>

* Only lookup interfaces for running containers

* Ignore not implemented status

* Check that key exists in properties dict

* define ignore errors in mock

* Use not in

---------

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 0f59bb7a99)

Co-authored-by: Scott Langendyk <scott@langendyk.com>

tests/unit/plugins/inventory/test_proxmox.py

@@ -37,7 +37,7 @@ def get_auth():
 
 # NOTE: when updating/adding replies to this function,
 # be sure to only add only the _contents_ of the 'data' dict in the API reply
-def get_json(url):
+def get_json(url, ignore_errors=None):
     if url == "https://localhost:8006/api2/json/nodes":
         # _get_nodes
         return [{"type": "node",