[stable19] show better quota warning for group folders and external storage

[backportbot-nextcloud]

backport of #22421

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 32362: failure

mariadb10.1-php7.2

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There were 2 warnings:

1) 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

2) 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

--

There was 1 failure:

1) OCA\Federation\Tests\DbHandlerTest::testAddServer with data set #0 ('http://owncloud.org', 'http://owncloud.org', 'dc1e290686987885ec40126d85b19...55fb8b')
Failed asserting that 1 is identical to 0.

/drone/src/apps/federation/tests/DbHandlerTest.php:88

mariadb10.4-php7.3

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There was 1 error:

1) Test\Files\Cache\Wrapper\CachePermissionsMaskTest::testExtended
Error: Call to a member function getCreationTime() on bool

/drone/src/tests/lib/Files/Cache/CacheTest.php:769

--

There were 2 warnings:

1) 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

2) 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

mysql8.0-php7.2

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There was 1 error:

1) OCA\WorkflowEngine\Tests\ManagerTest::testChecks
UnexpectedValueException: Check #0 does not exist

/drone/src/apps/workflowengine/lib/Manager.php:558
/drone/src/apps/workflowengine/tests/ManagerTest.php:139

--

There were 2 warnings:

1) 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

2) 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