[stable19] Keep direct login active when redirecting

[backportbot-nextcloud]

backport of #25424

[juliushaertl]

Hm, wondering why the tests that fail here are not failing on master/stable20:

There were 2 failures:

1) Tests\Core\Controller\LoginControllerTest::testLoginWithInvalidCredentials
Expectation failed for method name is "linkToRoute" when invoked 1 time(s)
Parameter 1 for invocation OCP\IURLGenerator::linkToRoute('core.login.showLoginForm', Array (...)): string does not match expected value.
Failed asserting that two arrays are equal.
--- Expected
+++ Actual
@@ @@
 Array (
     'user' => 'MyUserName'
     'redirect_url' => '/apps/files'
+    'direct' => 1
 )

/drone/src/core/Controller/LoginController.php:345
/drone/src/core/Controller/LoginController.php:316
/drone/src/tests/Core/Controller/LoginControllerTest.php:448

2) Tests\Core\Controller\LoginControllerTest::testToNotLeakLoginName
Expectation failed for method name is "linkToRoute" when invoked 1 time(s)
Parameter 1 for invocation OCP\IURLGenerator::linkToRoute('core.login.showLoginForm', Array (...)): string does not match expected value.
Failed asserting that two arrays are equal.
--- Expected
+++ Actual
@@ @@
 Array (
     'user' => 'john@doe.com'
     'redirect_url' => '/apps/files'
+    'direct' => 1
 )

/drone/src/core/Controller/LoginController.php:345
/drone/src/core/Controller/LoginController.php:316
/drone/src/tests/Core/Controller/LoginControllerTest.php:608

[rullzer]

Hm, wondering why the tests that fail here are not failing on master/stable20:

There were 2 failures:

1) Tests\Core\Controller\LoginControllerTest::testLoginWithInvalidCredentials
Expectation failed for method name is "linkToRoute" when invoked 1 time(s)
Parameter 1 for invocation OCP\IURLGenerator::linkToRoute('core.login.showLoginForm', Array (...)): string does not match expected value.
Failed asserting that two arrays are equal.
--- Expected
+++ Actual
@@ @@
 Array (
     'user' => 'MyUserName'
     'redirect_url' => '/apps/files'
+    'direct' => 1
 )

/drone/src/core/Controller/LoginController.php:345
/drone/src/core/Controller/LoginController.php:316
/drone/src/tests/Core/Controller/LoginControllerTest.php:448

2) Tests\Core\Controller\LoginControllerTest::testToNotLeakLoginName
Expectation failed for method name is "linkToRoute" when invoked 1 time(s)
Parameter 1 for invocation OCP\IURLGenerator::linkToRoute('core.login.showLoginForm', Array (...)): string does not match expected value.
Failed asserting that two arrays are equal.
--- Expected
+++ Actual
@@ @@
 Array (
     'user' => 'john@doe.com'
     'redirect_url' => '/apps/files'
+    'direct' => 1
 )

/drone/src/core/Controller/LoginController.php:345
/drone/src/core/Controller/LoginController.php:316
/drone/src/tests/Core/Controller/LoginControllerTest.php:608

there was some rewriting