Enable RTC for E2E tests.

Author: peterwilsoncc

tests/e2e/config/global-setup.js

@@ -35,6 +35,7 @@ async function globalSetup( config ) {
 		requestUtils.deleteAllPosts(),
 		requestUtils.deleteAllBlocks(),
 		requestUtils.resetPreferences(),
+		requestUtils.updateSiteSettings({ wp_collaboration_enabled: '1' })
 	] );
 
 	await requestContext.dispose();