[gradle, mpp] Change how outputs of associated compilations are handled

libraries/tools/kotlin-gradle-plugin-api/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinCompilation.kt

@@ -95,6 +95,9 @@ interface KotlinCompilationToRunnableFiles<T : KotlinCommonOptions> : KotlinComp
         get() = super.relatedConfigurationNames + runtimeDependencyConfigurationName
 }
 
+val <T : KotlinCommonOptions> KotlinCompilation<T>.runtimeDependencyConfigurationName: String?
+    get() = (this as? KotlinCompilationToRunnableFiles<T>)?.runtimeDependencyConfigurationName
+
 interface KotlinCompilationWithResources<T : KotlinCommonOptions> : KotlinCompilation<T> {
     val processResourcesTaskName: String
 }