Converted the patch in #2 and added tests

Closes #2633232

core/config/schema/core.data_types.schema.yml

@@ -470,6 +470,9 @@ block_settings:
       sequence:
         type: string
 
+condition.plugin.*:
+  type: ignore
+
 condition.plugin:
   type: mapping
   label: 'Condition'
@@ -500,6 +503,9 @@ condition.plugin.entity_bundle:*:
       sequence:
         type: string
 
+display_variant.plugin.*:
+  type: ignore
+
 display_variant.plugin:
   type: mapping
   label: 'Display variant'