fix(plugin-redirects): add missing optional chaining (#12753)

### What?
Updates the redirects plugin types to make collections a required type

### Why?
Currently not including the collections object when importing the plugin
causes an error to occur when going to the page in the UI, also it
cannot generate types. Likely due to it unable to make a reference to a
collection.

### How?
Makes collections required

Fixes #12709

---------

Co-authored-by: Patrick Roelofs <patrick.roelofs@iquality.nl>
Co-authored-by: Germán Jabloñski <43938777+GermanJablo@users.noreply.github.com>

Author: 3 people

packages/ui/src/elements/AddNewRelation/index.tsx

@@ -139,7 +139,7 @@ export const AddNewRelation: React.FC<Props> = ({
   }, [isDrawerOpen, relatedToMany])
 
   const label = t('fields:addNewLabel', {
-    label: getTranslation(relatedCollections[0].labels.singular, i18n),
+    label: getTranslation(relatedCollections[0]?.labels.singular, i18n),
   })
 
   if (show) {