Rework WPT runner

We have no crashing tests, remove safe mode. Allows better re-use of arenas,
and if we do introduce a crash, it won't be easy to ignore. Could allow for
re-using the environment across tests to further improve performance.

Remove console now that we have a working console api.

Author: karlseguin

src/browser/browser.zig

@@ -247,7 +247,7 @@ pub const Page = struct {
             .url = URL.empty,
             .session = session,
             .renderer = FlatRenderer.init(arena),
-             .window_clicked_event_node = .{ .func = windowClicked },
+            .window_clicked_event_node = .{ .func = windowClicked },
             .state = .{
                 .arena = arena,
                 .document = null,