TASK: Fix `I expect the content stream "user-cs-identifier" to not ex…

…ist`

The step was previously introduced via neos/neos-development-collection@433f369 but wrongly implemented.

see also neos/neos-development-collection#5096 (comment)

src/ContentRepositoryReadModelAdapter.php

@@ -101,6 +101,7 @@ public function findContentStreamById(ContentStreamId $contentStreamId): ?Conten
                 {$this->tableNames->contentStream()}
             WHERE
                 id = :contentStreamId
+                AND removed = FALSE
             LIMIT 1
         SQL;
         try {
@@ -123,6 +124,8 @@ public function findContentStreams(): ContentStreams
                 id, sourceContentStreamId, status, version
             FROM
                 {$this->tableNames->contentStream()}
+            WHERE
+                removed = FALSE
         SQL;
         try {
             $rows = $this->dbal->fetchAllAssociative($contentStreamsStatement);