[Gradle] Minor: Demote visibility of '.commonizeCInteropLibraries'

^KT-46198

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/CInteropCommonizerTask.kt

@@ -69,7 +69,7 @@ internal open class CInteropCommonizerTask : AbstractCInteropCommonizerTask() {
     }
 
     @TaskAction
-    internal fun commonizeCInteropLibraries() {
+    protected fun commonizeCInteropLibraries() {
         getAllInteropsGroups().forEach(::commonize)
     }