Retier react/renderer/textlayoutmanager headers (#58851)

Summary:
Pull Request resolved: #58851

Make `TextMeasurementRounding.h` private; it is only used by the iOS text layout manager and its tests. The Windows `TextLayoutManager.h` and `TextLayoutUtil.h` now reach `LayoutConstraints.h` and `ContextContainer.h` through the `<React/RendererCore.h>` and `<React/Utils.h>` umbrellas, matching the other platform variants, since both headers are public and reject direct includes from for-frameworks headers.

Changelog: [Internal]

Reviewed By: christophpurrer

Differential Revision: D123394863

Author: j-piasecki

packages/react-native/ReactCommon/react/renderer/textlayoutmanager/TextMeasurementRounding.h

@@ -7,7 +7,7 @@
 
 #pragma once
 
-#include <react/cxxstableapi/FrameworksGuard.h>
+#include <react/cxxstableapi/PrivateGuard.h>
 
 #include <cmath>