Rename UseExperimental->OptIn, Experimental->RequiresOptIn in compiler tests

compiler/testData/codegen/box/coroutines/asyncIteratorNullMerge_1_3.kt

@@ -20,7 +20,7 @@ interface AsyncIterator<out T> {
     operator suspend fun next(): T
 }
 
-@UseExperimental(ExperimentalTypeInference::class)
+@OptIn(ExperimentalTypeInference::class)
 fun <T> asyncGenerate(@BuilderInference block: suspend AsyncGenerator<T>.() -> Unit): AsyncSequence<T> = object : AsyncSequence<T> {
     override fun iterator(): AsyncIterator<T> {
         val iterator = AsyncGeneratorIterator<T>()

compiler/testData/codegen/box/coroutines/asyncIteratorToList_1_3.kt

@@ -21,7 +21,7 @@ interface AsyncIterator<out T> {
     operator suspend fun next(): T
 }
 
-@UseExperimental(ExperimentalTypeInference::class)
+@OptIn(ExperimentalTypeInference::class)
 fun <T> asyncGenerate(@BuilderInference block: suspend AsyncGenerator<T>.() -> Unit): AsyncSequence<T> = object : AsyncSequence<T> {
     override fun iterator(): AsyncIterator<T> {
         val iterator = AsyncGeneratorIterator<T>()

compiler/testData/codegen/box/coroutines/asyncIterator_1_3.kt

@@ -20,7 +20,7 @@ interface AsyncIterator<out T> {
     operator suspend fun next(): T
 }
 
-@UseExperimental(ExperimentalTypeInference::class)
+@OptIn(ExperimentalTypeInference::class)
 fun <T> asyncGenerate(@BuilderInference block: suspend AsyncGenerator<T>.() -> Unit): AsyncSequence<T> = object : AsyncSequence<T> {
     override fun iterator(): AsyncIterator<T> {
         val iterator = AsyncGeneratorIterator<T>()

compiler/testData/codegen/box/coroutines/builderInferenceAndGenericArrayAcessCall.kt

@@ -8,7 +8,7 @@ interface Foo<T>
 
 class FooImpl<T> : Foo<T>
 
-@UseExperimental(ExperimentalTypeInference::class)
+@OptIn(ExperimentalTypeInference::class)
 fun <T> myflow(@BuilderInference block: Foo<T>.() -> Unit): Foo<T> {
     val impl = FooImpl<T>()
     impl.block()

compiler/testData/codegen/box/coroutines/kt30858.kt

@@ -16,7 +16,7 @@ fun myLaunch(
     block: suspend MyCoroutineScope.() -> Unit
 ) {}
 
-@UseExperimental(kotlin.experimental.ExperimentalTypeInference::class)
+@OptIn(kotlin.experimental.ExperimentalTypeInference::class)
 public fun <E> myProduce(@BuilderInference block: suspend MyProducerScope<E>.() -> Unit) {}
 
 fun <T> MyReceiveChannel<T>.debounce(period: Long) {

compiler/testData/codegen/box/coroutines/kt31784.kt

@@ -2,7 +2,7 @@
 // IGNORE_BACKEND_FIR: JVM_IR
 // WITH_RUNTIME
 
-@file:UseExperimental(ExperimentalTypeInference::class)
+@file:OptIn(ExperimentalTypeInference::class)
 
 package test
 

compiler/testData/codegen/box/inference/builderInference.kt

@@ -22,7 +22,7 @@ interface LiveDataScope<T> {
     suspend fun emit(value: T)
 }
 
-@UseExperimental(ExperimentalTypeInference::class)
+@OptIn(ExperimentalTypeInference::class)
 fun <T> liveData(@BuilderInference block: suspend LiveDataScope<T>.() -> Unit): LiveData<T> = null!!
 
 fun <Value> Flow<Value>.asLiveData() = liveData {