TASK: Reintroduce content graph / cr read model cache

With neos/neos-development-collection#5246 the cache was naively removed ^^
But with the additional complexity of fetching workspaces etc it makes sense to reintroduce this cache layer.

Classes/Behavior/Features/Bootstrap/ProjectedNodeTrait.php

@@ -81,8 +81,6 @@ public function iGetTheNodeAtPath(string $serializedNodePath): void
     public function iExpectANodeIdentifiedByXToExistInTheContentGraph(string $serializedNodeDiscriminator): void
     {
         $nodeDiscriminator = NodeDiscriminator::fromShorthand($serializedNodeDiscriminator);
-        $contentRepositoryReadModel = $this->currentContentRepository->projectionState(ContentRepositoryReadModel::class);
-        $contentRepositoryReadModel->forgetInstances();
         $matchingWorkspace = $this->currentContentRepository->getWorkspaces()->find(
             static fn (Workspace $workspace) => $workspace->currentContentStreamId->equals($nodeDiscriminator->contentStreamId)
         );