Include renderer core via its umbrella header in DOM.h (#59107)

Summary:
Pull Request resolved: #59107

`DOM.h` is a "for frameworks" header but included `<react/renderer/core/ShadowNode.h>` directly. That header is in the public tier, so its `UmbrellaGuard` hard-errors when consumers opt into the strict API, and `RN_ALLOW_FRAMEWORKS` does not suppress it. Include the module umbrella `<React/RendererCore.h>` instead, which re-exports `ShadowNode.h`.

`RootShadowNode.h` stays as a direct include: it is itself a "for frameworks" header and its module has no public umbrella.

Changelog: [Internal]

___

landed-with-radar-review

Differential Revision: D125435350

fbshipit-source-id: ca0dc430d392f57097e03cd6e59d6ea0867dfe2a

Author: j-piasecki

packages/react-native/ReactCommon/react/renderer/dom/DOM.h

@@ -9,8 +9,8 @@
 
 #include <react/cxxstableapi/FrameworksGuard.h>
 
+#include <React/RendererCore.h>
 #include <react/renderer/components/root/RootShadowNode.h>
-#include <react/renderer/core/ShadowNode.h>
 #include <cstdint>
 #include <string>
 #include <vector>