Issue #3413313 by bluegeek9: Deprecated function file_validate

ldap_authentication/ldap_authentication.api.php

ldap_authentication/ldap_authentication.install

ldap_authentication/ldap_authentication.module

ldap_authentication/src/Access/UserHelpTabAccess.php

ldap_authentication/src/AuthenticationServers.php

ldap_authentication/src/Controller/LdapHelpRedirect.php

ldap_authentication/src/Controller/LoginValidatorBase.php

...authentication/src/Controller/LoginValidatorInterface.php

...authentication/src/Controller/LoginValidatorLoginForm.php

ldap_authentication/src/Controller/LoginValidatorSso.php

ldap_authentication/src/Form/LdapAuthenticationAdminForm.php

...tication/src/Form/LdapAuthenticationProfileUpdateForm.php

...hentication/src/Plugin/Derivative/DynamicUserHelpLink.php

ldap_authentication/src/Routing/EmailTemplateService.php

ldap_authentication/src/Routing/RouteSubscriber.php

.../tests/src/Functional/LdapAuthenticationAdminFormTest.php

...rc/Functional/LdapAuthenticationProfileUpdateFormTest.php

ldap_authentication/tests/src/Kernel/HookTest.php

ldap_authentication/tests/src/Kernel/LoginTest.php

ldap_authentication/tests/src/Kernel/RedirectTest.php