[BUGFIX] Cast port to integer when setting up the database

Ensure env variable from port is cast to integer
when setting up TYPO3 with Environment variable
TYPO3_INSTALL_DB_PORT.

Resolves: #103826
Releases: main, 12.4
Change-Id: Ibd982690d3eec0527f452cd7353bdc0bf1a572c4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/84204


Tested-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benni Mack <benni@typo3.org>

typo3/sysext/install/Classes/Service/SetupDatabaseService.php

@@ -217,6 +217,9 @@ class SetupDatabaseService
             $envVar = 'TYPO3_INSTALL_DB_' . strtoupper($value);
             if (getenv($envVar) !== false) {
                 $envCredentials[$value] = getenv($envVar);
+                if ($value === 'port') {
+                    $envCredentials[$value] = (int)$envCredentials[$value];
+                }
             }
         }
         if (!empty($envCredentials)) {