[stable20] Type the \OCP\IUserManager::callForAllUsers closure with Psalm

[backportbot-nextcloud]

backport of #23743

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 34682: failure

mariadb10.4-php7.3

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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

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There was 1 failure:

1) OCA\Federation\Tests\DbHandlerTest::testGetAll
Failed asserting that 8 is identical to 0.

/drone/src/apps/federation/tests/DbHandlerTest.php:139

mysql8.0-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) Test\Files\Cache\ScannerTest::testRepairParentShallow
Failed asserting that false is true.

/drone/src/tests/lib/Files/Cache/ScannerTest.php:367

acceptance-header

• tests/acceptance/features/header.feature:33

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  Scenario: users from other groups are not seen in the contacts menu when autocompletion is restricted within the same group # /drone/src/tests/acceptance/features/header.feature:33
    Given I am logged in as the admin                                                                                         # LoginPageContext::iAmLoggedInAsTheAdmin()
    And I visit the settings page                                                                                             # SettingsMenuContext::iVisitTheSettingsPage()
    And I open the "Sharing" section of the "Administration" group                                                            # AppNavigationContext::iOpenTheSectionOf()
    And I enable restricting username autocompletion to groups                                                                # SettingsContext::iEnableRestrictingUsernameAutocompletionToGroups()
    And I see that username autocompletion is restricted to groups                                                            # SettingsContext::iSeeThatUsernameAutocompletionIsRestrictedToGroups()
    When I open the Contacts menu                                                                                             # ContactsMenuContext::iOpenTheContactsMenu()
    Then I see that the Contacts menu is shown                                                                                # ContactsMenuContext::iSeeThatTheContactsMenuIsShown()
    And I see that the contact "user0" in the Contacts menu is not shown                                                      # ContactsMenuContext::iSeeThatTheContactInTheContactsMenuIsNotShown()
      Failed asserting that true is false.
    And I see that the contact "admin" in the Contacts menu is not shown                                                      # ContactsMenuContext::iSeeThatTheContactInTheContactsMenuIsNotShown()