Introduce experimental kotlin.concurrent.Volatile annotation KT-55268, KT-55609

Use this annotation in tests to ensure it works the same at least on JVM

libraries/stdlib/common/src/kotlin/JvmAnnotationsH.kt

@@ -122,8 +122,16 @@ public expect annotation class JvmInline()
 public expect annotation class JvmRecord()
 
 /**
- * Marks the JVM backing field of the annotated property as `volatile`, meaning that writes to this field
- * are immediately made visible to other threads.
+ * Marks the JVM backing field of the annotated `var` property as `volatile`, meaning that reads and writes to this field
+ * are atomic and writes are always made visible to other threads. If another thread reads the value of this field (e.g. through its accessor),
+ * it sees not only that value, but all side effects that led to writing that value.
+ *
+ * This annotation has effect only in Kotlin/JVM. It's recommended to use [kotlin.concurrent.Volatile] annotation instead
+ * in multiplatform projects.
+ *
+ * Note that only _backing field_ operations are atomic when the field is annotated with `Volatile`.
+ * For example, if the property getter or setter make several operations with the backing field,
+ * a _property_ operation, i.e. reading or setting it through these accessors, is not guaranteed to be atomic.
  */
 @Target(FIELD)
 @MustBeDocumented