Update paragraph migration bundle syntax.

Closes #3490279

Update the Paragraph bundle syntax so that paragraphs are migrated into the correct paragraph bundles.

To test:

• Roll back paragraph migrations. Note this takes longer than importing them, I'd run the large ones overnight
• Import the paragraphs
• verify they have been created as part of the correct bundles
• update the entities that reference the paragraphs

migrations/drupalorg_migrate_field_collection_contribution_role.yml

 id: drupalorg_migrate_field_collection_contribution_role
-label: 'Drupal.org field collection "Organizations"'
+label: 'Drupal.org field collection "Contributor Role"'
 migration_group: drupalorg_migrate
 migration_tags:
   - Drupal 7
@@ -13,6 +13,7 @@ source:
 
 destination:
   plugin: entity_reference_revisions:paragraph
+  default_bundle: contribution_role
 
 process:
   field_con_role:
@@ -52,9 +53,6 @@ process:
         from_format: 'Y-m-d H:i:s'
         to_format: 'Y-m-d'
         source: value
-  type:
-    plugin: default_value
-    default_value: contribution_role
   revision_id: revision_id
   langcode:
     plugin: default_value