Deprecate support for networking-ansible

The networking-ansible project[1] has been unmaintained. The project
does not provide any release since Victoria.

Because we haven't heard any interest to manage this plugin using
puppet-neutron[2], we'll deprecate support for the plugin, and will
remove the whole implementation after Zed release.

[1] https://opendev.org/x/networking-ansible
[2] http://lists.openstack.org/pipermail/openstack-discuss/2022-May/028503.html

Change-Id: I57dc8ed3d55af33081a88e4b810d276ba9d98630

manifests/plugins/ml2/networking_ansible.pp

@@ -1,5 +1,6 @@
 # == Class: neutron::plugins::ml2::networking_ansible
 #
+# DEPRECATED !!
 # Configures the networking-ansible ML2 Mechanism Driver
 #
 # === Parameters
@@ -35,11 +36,14 @@ class neutron::plugins::ml2::networking_ansible(
   $host_configs,
   $coordination_uri = $::os_service_default,
   $package_ensure   = 'present'
-  ) {
+) {
   include neutron::deps
   include neutron::params
   require neutron::plugins::ml2
 
+  warning('Support for networking-ansible has been deprecated and \
+will be removed in a future release.')
+
   if($::osfamily != 'RedHat') {
     # Drivers are only packaged for RedHat at this time
     fail("Unsupported osfamily ${::osfamily}")

manifests/plugins/ml2/networking_ansible_host.pp

@@ -1,6 +1,7 @@
-# Defined type for networking-ansible configuration for a host/switch
+# == Define: neutron::plugins::ml2::networking_ansible_host
 #
-# == Class: neutron::plugins::ml2::networking_ansible_host
+# DEPRECATED !!
+# Defined type for networking-ansible configuration for a host/switch
 #
 # === Parameters
 #
@@ -50,6 +51,9 @@ define neutron::plugins::ml2::networking_ansible_host(
   include neutron::deps
   require neutron::plugins::ml2
 
+  warning('Support for networking-ansible has been deprecated and \
+will be removed in a future release.')
+
   if ((is_service_default($ansible_ssh_pass) and is_service_default($ansible_ssh_private_key_file)) or
       (!is_service_default($ansible_ssh_pass) and !is_service_default($ansible_ssh_private_key_file))) {
     fail('One of ansible_ssh_pass OR ansible_ssh_private_key_file should be set')

releasenotes/notes/deprecate-networking-ansible-af719626422d0636.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Support for the ``networking-ansible`` plugin has been deprecated, and will
+    be removed in a future release.