fix(android): compile RNGestureHandlerModule with Kotlin 2.3 (#4043)

## Summary

Fixes Android compilation when using **Kotlin 2.3.x**. The previous code
compared `it.rootView.rootViewTag` to a local `rootViewTag`; the local
name shadows the synthetic property accessor, and Kotlin **2.3**
reports:

> Function invocation `getRootViewTag()` expected

Use an explicit receiver and `ReactRootView#getRootViewTag()` instead.

## Context

- Downstream projects bump Kotlin (e.g. to **2.3.0**) for dependencies
such as **Stripe Android SDK** and hit a hard failure in
`:react-native-gesture-handler:compileDebugKotlin`.
- Closes #4042.

## Test plan

- [ ] `./gradlew
:packages:react-native-gesture-handler:compileDebugKotlin` (or
project-equivalent) with Kotlin **2.3.x**

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Jakub Piasecki <jakub.piasecki@swmansion.com>

Author: 3 people

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/RNGestureHandlerModule.kt

@@ -170,7 +170,8 @@ class RNGestureHandlerModule(reactContext: ReactApplicationContext?) :
     }
     synchronized(roots) {
       return roots.firstOrNull {
-        it.rootView is ReactRootView && it.rootView.rootViewTag == rootViewTag
+        val rv = it.rootView
+        rv is ReactRootView && rv.getRootViewTag() == rootViewTag
       }
     }
   }