[BUGFIX] Exclude relations to tables in sys_refindex

The method "shouldExcludeTableFromReferenceIndex()" which
also incorporates a PSR-14 currently only skips references
FROM a specific table, but in order to keep consistency, they
should also be excluded TO this specific table.

Resolves: #89100
Releases: master, 10.4
Change-Id: I0bee4fb12cb461e51a97180addd0b0358fba8412
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65566
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>

typo3/sysext/core/Classes/Database/ReferenceIndex.php

@@ -260,6 +260,10 @@ public function updateRefIndexTable($tableName, $uid, $testOnly = false)
                     if (!is_array($relation)) {
                         continue;
                     }
+                    // Exclude any relations TO a specific table
+                    if (($relation['ref_table'] ?? '') && $this->shouldExcludeTableFromReferenceIndex($relation['ref_table'])) {
+                        continue;
+                    }
                     $relation['hash'] = md5(implode('///', $relation) . '///' . $this->hashVersion);
                     // First, check if already indexed and if so, unset that row (so in the end we know which rows to remove!)
                     if (isset($currentRelationHashes[$relation['hash']])) {