renderer: Explicit sync fixes (#7151)

Enables explicit sync by default for most platforms

`misc:no_direct_scanout` -> `render:direct_scanout`

src/helpers/ScopeGuard.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <functional>
+
+// calls a function when it goes out of scope
+class CScopeGuard {
+  public:
+    CScopeGuard(const std::function<void()>& fn_);
+    ~CScopeGuard();
+
+  private:
+    std::function<void()> fn;
+};