[stable19] LDAP: make actually use of batch read known groups

[backportbot-nextcloud]

⚠️ This backport had conflicts and is incomplete ⚠️ ✔️

backport of #25101

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 2367: failure

mariadb10.4-php7.3

Show full log

There were 2 errors:
1) OCA\FederatedFileSharing\Tests\FederatedShareProviderTest::testGetSharesInFolder
OCP\Share\Exceptions\ShareNotFound: There was an error retrieving the share. Maybe the link is wrong, it was unshared, or it was deleted.
/drone/src/apps/federatedfilesharing/lib/FederatedShareProvider.php:863
/drone/src/apps/federatedfilesharing/lib/FederatedShareProvider.php:242
/drone/src/apps/federatedfilesharing/tests/FederatedShareProviderTest.php:912
2) OCA\FederatedFileSharing\Tests\FederatedShareProviderTest::testGetAccessList
InvalidArgumentException: Username is invalid because files already exist for this user
/drone/src/lib/private/User/Manager.php:355
/drone/src/lib/private/User/Manager.php:309
/drone/src/apps/federatedfilesharing/tests/FederatedShareProviderTest.php:931
--
There were 5 warnings:
1) Test\DB\QueryBuilder\QueryBuilderTest::testExecuteWithParameterTooLarge
Cannot stub or mock class or interface "Doctrine\DBAL\Result" which does not exist
2) Test\DB\QueryBuilder\QueryBuilderTest::testExecuteWithParametersTooMany
Cannot stub or mock class or interface "Doctrine\DBAL\Result" which does not exist
3) Test\Files\ViewTest::testRenameFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static
4) Test\Files\ViewTest::testCopyFailDeleteTargetKeepSource
Trying to configure method "writeStream" which cannot be configured because it does not exist, has not been specified, is final, or is static
5) OCA\Files_Sharing\Tests\External\ManagerTest::testAddShare
Cannot stub or mock class or interface "OCA\Files_Sharing\Tests\External\IManager" which does not exist