[Gradle] Fix cocoapods' cinterops UTD

^KT-60112 Verification Pending

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/cocoapods/KotlinCocoapodsPlugin.kt

@@ -338,6 +338,10 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                     val podBuildTaskProvider = project.getPodBuildTaskProvider(target, pod)
                     val buildSettingsFileProvider = project.buildSettingsFileProvider(pod, target)
                     interopTask.inputs.file(buildSettingsFileProvider)
+
+                    // Since we can't properly declare frameworks as inputs (see below) it's the best approximation
+                    interopTask.inputs.files(podBuildTaskProvider.flatMap { it.srcDir })
+
                     interopTask.dependsOn(podBuildTaskProvider)
 
                     interopTask.doFirst { _ ->