Removing reactnativeutilsjni as it is built from the same sources as reactnativejni (#34339)

Summary:
This Pull Request aims at removing the making of reactnativeutilsjni as it is built from the same sources as reactnativejni. It also replaces references to reactnativeutilsjni with reactnativejni.

This should get rid of `reactnativeutilsjni.so` while reusing `reactnativejni.so` in it's place. This should give us some size improvements in the finally built apk.
## Changelog

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[Android] [Changed] - Replaced reactnativeutilsjni with reactnativejni in the build process to reduce size

Pull Request resolved: https://github.com/facebook/react-native/pull/34339

Test Plan:
1. Ran the CMakelist.txt file using CMake and I could see that reactnativeutilsjni.dir is no longer generated with my changes.
2. Built the aar from this branch in Android Studio and build happened successfully.

I am not sure if we could run any more tests. Please let me know in case anymore testing is required and I can do accordingly

Reviewed By: cortinico

Differential Revision: D38400481

Pulled By: genkikondo

fbshipit-source-id: 592736e56441328389ae89135667c336ff8018e6

ReactAndroid/src/main/java/com/facebook/react/fabric/jni/CMakeLists.txt

@@ -44,7 +44,7 @@ target_link_libraries(
         react_render_uimanager
         react_utils
         react_config
-        reactnativeutilsjni
+        reactnativejni
         rrc_image
         rrc_modal
         rrc_progressbar