Add missing pgsql USAGE privilege

library/Icinga/Application/MigrationManager.php

@@ -207,7 +207,7 @@ final class MigrationManager implements Countable
      */
     public function getRequiredDatabasePrivileges(): array
     {
-        return ['CREATE','SELECT','INSERT','UPDATE','DELETE','DROP','ALTER','CREATE VIEW','INDEX','EXECUTE'];
+        return ['CREATE','SELECT','INSERT','UPDATE','DELETE','DROP','ALTER','CREATE VIEW','INDEX','EXECUTE','USAGE'];
     }
 
     /**

modules/setup/library/Setup/WebWizard.php

@@ -83,6 +83,7 @@ class WebWizard extends Wizard implements SetupWizard
         'ALTER',
         'DROP',
         'INDEX',
+        'USAGE', // PostgreSQL
         'TEMPORARY', // PostgreSql
         'CREATE TEMPORARY TABLES' // MySQL
     );