[Templating] #9071 array param for EngineInterface::render()

We allow an array to be given as param to
Symfony/Component/Templating/EngineInterface::render()
and Symfony/Bundle/FrameworkBundle/Templating
/EngineInterface::renderView(). We modify Symfony\Bridge
\Twig\TwigEngine so it accepts an array as param to
TwigEngine::render(). We add a test for that.
Controller:render() and ::renderView() now accept array as
parameter.