Fix new warnings after a rebase

Upgrading to Kotlin 2.2.20 brought new warnings, which this commit
fixes.

Author: dkhalanskyjb

kotlinx-coroutines-core/nativeDarwin/test/MainDispatcherTest.kt

@@ -10,11 +10,13 @@ import kotlin.test.*
 
 class MainDispatcherTest : MainDispatcherTestBase.WithRealTimeDelay() {
 
+    @OptIn(ExperimentalForeignApi::class)
     override fun isMainThread(): Boolean = CFRunLoopGetCurrent() == CFRunLoopGetMain()
 
     // skip if already on the main thread, run blocking doesn't really work well with that
     override fun shouldSkipTesting(): Boolean = isMainThread()
 
+    @OptIn(BetaInteropApi::class)
     override fun scheduleOnMainQueue(block: () -> Unit) {
         autoreleasepool {
             dispatch_async(dispatch_get_main_queue()) {

kotlinx-coroutines-core/wasmJs/test/PromiseTest.kt

@@ -4,6 +4,7 @@ import kotlinx.coroutines.testing.*
 import kotlin.js.*
 import kotlin.test.*
 
+@OptIn(ExperimentalWasmJsInterop::class)
 class PromiseTest : TestBase() {
     @Test
     fun testPromiseResolvedAsDeferred() = GlobalScope.promise {

kotlinx-coroutines-core/wasmJs/test/PropagateExceptionFinalResortTest.kt

@@ -30,6 +30,7 @@ class PropagateExceptionFinalResortTest : TestBase() {
     }
 }
 
+@OptIn(ExperimentalWasmJsInterop::class)
 private fun addUncaughtExceptionHandlerHelper() {
     js("""
             globalThis.exceptionCaught = false;
@@ -40,10 +41,12 @@ private fun addUncaughtExceptionHandlerHelper() {
         """)
 }
 
+@OptIn(ExperimentalWasmJsInterop::class)
 private fun removeHandlerHelper() {
     js("""
             process.removeListener('uncaughtException', globalThis.exceptionHandler);
         """)
 }
 
+@OptIn(ExperimentalWasmJsInterop::class)
 private fun exceptionCaught(): Boolean = js("globalThis.exceptionCaught")

kotlinx-coroutines-test/wasmJs/test/Helpers.kt

@@ -1,5 +1,6 @@
 package kotlinx.coroutines.test
 
+@OptIn(ExperimentalWasmJsInterop::class)
 actual fun testResultChain(block: () -> TestResult, after: (Result<Unit>) -> TestResult): TestResult =
     block().then(
         {

kotlinx-coroutines-test/wasmJs/test/PromiseTest.kt

@@ -4,6 +4,7 @@ import kotlinx.coroutines.*
 import kotlin.test.*
 
 class PromiseTest {
+    @OptIn(ExperimentalWasmJsInterop::class)
     @Test
     fun testCompletionFromPromise() = runTest {
         var promiseEntered = false
@@ -15,4 +16,4 @@ class PromiseTest {
         p.await<JsAny>()
         assertTrue(promiseEntered)
     }
-}
+}

test-utils/wasmJs/src/TestBase.kt

@@ -1,3 +1,5 @@
+@file:OptIn(ExperimentalWasmJsInterop::class)
+
 package kotlinx.coroutines.testing
 
 import kotlin.test.*