K1: Implement a checker that disallows to have different member scopes for expect open and its actual

^KT-22841 Fixed
Review: https://jetbrains.team/p/kt/reviews/11603/timeline

The commit also introduces `@AllowDifferentMembersInActual` annotation in
stdlib which allows to suppress the diagnostic

libraries/stdlib/wasm/src/kotlin/reflect/KClass.kt

@@ -32,4 +32,7 @@ public actual interface KClass<T : Any> : KClassifier {
     @SinceKotlin("1.1")
     public actual fun isInstance(value: Any?): Boolean
 
+    actual override fun equals(other: Any?): Boolean // KT-24971
+
+    actual override fun hashCode(): Int // KT-24971
 }

libraries/stdlib/wasm/src/kotlin/reflect/KClassImpl.kt

@@ -15,6 +15,9 @@ internal object NothingKClassImpl : KClass<Nothing> {
     override val qualifiedName: String get() = "kotlin.Nothing"
 
     override fun isInstance(value: Any?): Boolean = false
+
+    override fun equals(other: Any?): Boolean = super.equals(other) // KT-24971
+    override fun hashCode(): Int = super.hashCode() // KT-24971
 }
 
 internal object ErrorKClass : KClass<Nothing> {
@@ -22,6 +25,9 @@ internal object ErrorKClass : KClass<Nothing> {
     override val qualifiedName: String get() = error("Unknown qualifiedName for ErrorKClass")
 
     override fun isInstance(value: Any?): Boolean = error("Can's check isInstance on ErrorKClass")
+
+    override fun equals(other: Any?): Boolean = super.equals(other) // KT-24971
+    override fun hashCode(): Int = super.hashCode() // KT-24971
 }
 
 internal class KClassImpl<T : Any>(internal val typeData: TypeInfoData) : KClass<T> {