[K/N] Add kotlinx.cinterop.ExperimentalForeignApi opt-ins

Add more opt-ins in Samples, tests and Benchmarks.
This is a follow-up to KT-MR-9788 

Merge-request: KT-MR-9997
Merged-by: Pavel Punegov <Pavel.Punegov@jetbrains.com>

kotlin-native/backend.native/tests/link/purge1/lib.kt

@@ -2,6 +2,7 @@
  * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 import kotlinx.cinterop.convert
 import platform.posix.*

kotlin-native/backend.native/tests/samples/build.gradle.kts

@@ -21,7 +21,10 @@ allprojects {
     }
 
     tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinNativeCompile>().configureEach {
-        compilerOptions.freeCompilerArgs.add("-XXLanguage:+ImplicitSignedToUnsignedIntegerConversion")
+        compilerOptions.freeCompilerArgs.addAll(
+                "-XXLanguage:+ImplicitSignedToUnsignedIntegerConversion",
+                "-opt-in=kotlinx.cinterop.ExperimentalForeignApi"
+        )
     }
 }
 

kotlin-native/performance/cinterop/build.gradle.kts

@@ -20,8 +20,14 @@ benchmark {
 }
 
 val native = kotlin.targets.getByName("native") as KotlinNativeTarget
-native.compilations["main"].cinterops {
-    create("macros")
-    create("struct")
-    create("types")
+native.compilations["main"].apply {
+    cinterops {
+        create("macros")
+        create("struct")
+        create("types")
+    }
+    compilerOptions
+            .options
+            .freeCompilerArgs
+            .add("-opt-in=kotlinx.cinterop.ExperimentalForeignApi")
 }

kotlin-native/performance/ring/src/main/kotlin/org/jetbrains/ring/WeakRefBenchmark.kt

@@ -2,6 +2,7 @@
  * Copyright 2010-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 package org.jetbrains.ring
 

kotlin-native/performance/shared/src/main/kotlin-native/common/org/jetbrains/benchmarksLauncher/Utils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2017 JetBrains s.r.o.
+ * Copyright 2010-2023 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 package org.jetbrains.benchmarksLauncher
 

kotlin-native/performance/shared/src/main/kotlin-native/mingw/org/jetbrains/benchmarksLauncher/Utils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2017 JetBrains s.r.o.
+ * Copyright 2010-2023 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 package org.jetbrains.benchmarksLauncher
 

kotlin-native/performance/shared/src/main/kotlin-native/posix/org/jetbrains/benchmarksLauncher/Utils.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2017 JetBrains s.r.o.
+ * Copyright 2010-2023 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 package org.jetbrains.benchmarksLauncher
 

kotlin-native/tools/benchmarksAnalyzer/src/main/kotlin-native/org/jetbrains/analyzer/Utils.kt

@@ -1,7 +1,8 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * Copyright 2010-2023 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
  * that can be found in the LICENSE file.
  */
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
 
 package org.jetbrains.analyzer