Fixes #35496 - Add default pulp_deb config

https://projects.theforeman.org/issues/35496

For Katello users this is the sane/expected default behaviour. It allows
for the synchronization of partial Ubuntu mirrors, a very common use
case in the wild. Users often stumble over the error that is thrown for
such mirrors without this setting.

manifests/plugin/deb.pp

@@ -1,7 +1,12 @@
 # @summary Pulp Deb plugin
-# @param use_pulp2_content_route Whether to redirect the legacy (Pulp 2) URL, /pulp/deb/, to the content server
+# @param use_pulp2_content_route
+#   Whether to redirect the legacy (Pulp 2) URL, /pulp/deb/, to the content server
+# @param force_ignore_missing_package_indices
+#   Wheter to set the FORCE_IGNORE_MISSING_PACKAGE_INDICES setting to True or
+#   False in /etc/pulp/settings.py.
 class pulpcore::plugin::deb (
   Boolean $use_pulp2_content_route = false,
+  Boolean $force_ignore_missing_package_indices = true,
 ) {
   if $use_pulp2_content_route {
     $context = {
@@ -27,7 +32,10 @@
     $content = undef
   }
 
+  $deb_plugin_config_fimpi = to_python($force_ignore_missing_package_indices)
+
   pulpcore::plugin { 'deb':
+    config        => "FORCE_IGNORE_MISSING_PACKAGE_INDICES = ${deb_plugin_config_fimpi}",
     http_content  => $content,
     https_content => $content,
   }

metadata.json

@@ -12,7 +12,7 @@
     },
     {
       "name": "puppetlabs/stdlib",
-      "version_requirement": ">= 4.25.0 < 9.0.0"
+      "version_requirement": ">= 8.3.0 < 9.0.0"
     },
     {
       "name": "puppet/redis",

spec/classes/plugin_deb_spec.rb

@@ -19,6 +19,16 @@
           is_expected.to contain_pulpcore__plugin('deb')
             .that_subscribes_to('Class[Pulpcore::Install]')
             .that_notifies(['Class[Pulpcore::Database]', 'Class[Pulpcore::Service]'])
+            .with_config('FORCE_IGNORE_MISSING_PACKAGE_INDICES = True')
+        end
+
+        context 'with force ignore missing set' do
+          let(:params) { { force_ignore_missing_package_indices: false } }
+
+          it do
+            is_expected.to contain_pulpcore__plugin('deb')
+              .with_config('FORCE_IGNORE_MISSING_PACKAGE_INDICES = False')
+          end
         end
 
         context 'with pulp2 content route' do