Remove Database group again where possible

Override the target language in the parser options, so that it isn’t
looked up from the database; this lets UriLibraryTest avoid database
access. And since the Database group is no longer strictly required,
remove the statement to that effect from the phpdoc again.

Bug: T345372
Change-Id: I79f35257b123eb939d9ab67b16aa56d34586bb67

tests/phpunit/Engines/LuaCommon/LuaEngineTestBase.php

@@ -16,8 +16,6 @@ use PHPUnit\Framework\TestSuite;
  * - $moduleName: Name of the module being tested
  * - getTestModules(): Add a mapping from $moduleName to the file containing
  *   the code.
- *
- * Also, your test must be in the Database group.
  */
 abstract class LuaEngineTestBase extends MediaWikiLangTestCase {
 	use LuaEngineTestHelper;

tests/phpunit/Engines/LuaCommon/LuaEngineTestHelper.php

@@ -143,9 +143,11 @@ trait LuaEngineTestHelper {
 	 */
 	protected function getEngine() {
 		if ( !$this->engine ) {
-			$parser = MediaWikiServices::getInstance()->getParserFactory()->create();
+			$services = MediaWikiServices::getInstance();
+			$parser = $services->getParserFactory()->create();
 			$options = ParserOptions::newFromAnon();
 			$options->setTemplateCallback( [ $this, 'templateCallback' ] );
+			$options->setTargetLanguage( $services->getLanguageFactory()->getLanguage( 'en' ) );
 			$parser->startExternalParse( $this->getTestTitle(), $options, Parser::OT_HTML, true );
 
 			// HACK

tests/phpunit/Engines/LuaCommon/UriLibraryTest.php

@@ -4,8 +4,6 @@ namespace MediaWiki\Extension\Scribunto\Tests\Engines\LuaCommon;
 
 /**
  * @covers \MediaWiki\Extension\Scribunto\Engines\LuaCommon\UriLibrary
- *
- * @group Database
  */
 class UriLibraryTest extends LuaEngineTestBase {
 	/** @inheritDoc */