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

compiler/testData/codegen/box/multiplatform/defaultArguments/bothInExpectAndActual2.kt

@@ -1,4 +1,5 @@
 // !LANGUAGE: +MultiPlatformProjects
+// WITH_STDLIB
 // IGNORE_BACKEND: NATIVE
 // IGNORE_BACKEND_K2: ANY
 // FIR status: outdated code (expect and actual in the same module)
@@ -20,6 +21,8 @@ actual interface I {
     actual fun test(source: String = "actual")
 }
 
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual interface J : I {
     override fun test(source: String) {
         if (source != "actual") throw AssertionError(source)

compiler/testData/codegen/box/multiplatform/hmpp/simple.kt

@@ -3,6 +3,7 @@
  * Js backend is ignored because they use old test infrastructure which doesn't support HMPP
  */
 
+// WITH_STDLIB
 // !LANGUAGE: +MultiPlatformProjects
 
 // TARGET_BACKEND: JVM
@@ -25,6 +26,8 @@ fun getB(): B = B()
 
 // MODULE: main()()(intermediate)
 // FILE: main.kt
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual open class A actual constructor() {
     fun bar(): String = "K"
 }

compiler/testData/codegen/box/multiplatform/k2/basic/expectInterfaceInSupertypes.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND_K1: JS, JS_IR, JS_IR_ES6, NATIVE, WASM
+// WITH_STDLIB
 // !LANGUAGE: +MultiPlatformProjects
 
 // MODULE: common
@@ -17,12 +18,16 @@ class B : A()
 // MODULE: platform()()(common)
 // FILE: platform.kt
 
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual interface S1 {
     fun o(): S = "O"
     val p: Boolean
         get() = true
 }
 
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual interface S2 {
     fun k() = "K"
 }

compiler/testData/codegen/box/multiplatform/k2/basic/expectInterfaceInSupertypes2.kt

@@ -1,4 +1,5 @@
 // IGNORE_BACKEND_K1: JS, JS_IR, JS_IR_ES6, NATIVE, WASM
+// WITH_STDLIB
 // !LANGUAGE: +MultiPlatformProjects
 
 // MODULE: common
@@ -17,6 +18,8 @@ class B : A()
 // MODULE: platform()()(common)
 // FILE: platform.kt
 
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual interface S1 {
     fun s1() = "O"
 }
@@ -25,9 +28,13 @@ interface S20 {
     fun s2() = "K"
 }
 
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual interface S2 : S20 {
 }
 
+@OptIn(ExperimentalMultiplatform::class)
+@AllowDifferentMembersInActual
 actual interface S : S1, S2 {
     fun s3() = s1() + s2()
 }