phpunit: Acknowledge known dberror from SpecialPageFatalTest

This is specifically for fatal errors, so it's fine that some
queries encounter (non-fatal) errors. Surpress them for now,
so that we can safely re-enable enforcement for everything else.

Bug: T248191
Change-Id: I962ee2dbb0568cc869fda6fa7312edc45ba43215

tests/phpunit/structure/SpecialPageFatalTest.php

@@ -13,6 +13,13 @@ use MediaWiki\MediaWikiServices;
  * @author Addshore
  */
 class SpecialPageFatalTest extends MediaWikiTestCase {
+
+	public function setUp() : void {
+		parent::setUp();
+		// FIXME: Acknowledge known non-fatal query (T248191)
+		$this->setMwGlobals( 'wgDBerrorLog', false );
+	}
+
 	public function provideSpecialPages() {
 		$specialPages = [];
 		$spf = MediaWikiServices::getInstance()->getSpecialPageFactory();