BUGFIX: Find nodes in CR without security checks to allow nodes of other workspaces

Backport of #419 to Neos 8.x

This wraps the getNodeByIdentifier() call in withoutAuthorizationChecks()
to prevent workspace-related authorization checks from failing when
indexing nodes that exist in different workspaces.

Resolves the error: Node workspace "user-xxx" not found in allowed
workspaces (live), this could result from a detached workspace entity
in the context.

Author: gradinarufelix

Classes/Indexer/NodeIndexer.php

@@ -36,6 +36,7 @@
 use Neos\ContentRepository\Search\Indexer\AbstractNodeIndexer;
 use Neos\ContentRepository\Search\Indexer\BulkNodeIndexerInterface;
 use Neos\Flow\Annotations as Flow;
+use Neos\Flow\Security\Context as SecurityContext;
 use Neos\Utility\Exception\FilesException;
 use Neos\Flow\Log\Utility\LogEnvironment;
 use Psr\Log\LoggerInterface;
@@ -145,6 +146,12 @@ class NodeIndexer extends AbstractNodeIndexer implements BulkNodeIndexerInterfac
      */
     protected $errorStorage;
 
+    /**
+     * @Flow\Inject
+     * @var SecurityContext
+     */
+    protected $securityContext;
+
     /**
      * The current Elasticsearch bulk request, in the format required by https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-bulk.html
      */
@@ -270,7 +277,11 @@ public function indexNode(NodeInterface $node, $targetWorkspace = null): void
         };
 
         $handleNode = function (NodeInterface $node, Context $context) use ($targetWorkspace, $indexer) {
-            $nodeFromContext = $context->getNodeByIdentifier($node->getIdentifier());
+            $nodeFromContext = $this->securityContext->withoutAuthorizationChecks(
+                function () use ($context, $node) {
+                    return $context->getNodeByIdentifier($node->getIdentifier());
+                }
+            );
             if ($nodeFromContext instanceof NodeInterface) {
                 $this->searchClient->withDimensions(static function () use ($indexer, $nodeFromContext, $targetWorkspace) {
                     $indexer($nodeFromContext, $targetWorkspace);