[Gradle] Fix warnings in KotlinCocoapodsPlugin

^KT-56904 In Progress

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

@@ -334,6 +334,7 @@ open class KotlinCocoapodsPlugin : Plugin<Project> {
                     }
 
                     with(interop) {
+                        @Suppress("DEPRECATION") // deprecated property is used intentionally during deprecation period
                         defFileProperty.set(defTask.flatMap { it.defFile.asFile })
                         _packageNameProp.set(project.provider { pod.packageName })
                         _extraOptsProp.addAll(project.provider { pod.extraOpts })