ObjCExport: deprecate exporting data class componentN methods to Obj-C

The Objective-C methods for Kotlin data class componentN methods
shouldn't have been generated in the first place -- the corresponding
Kotlin methods are required to make the destructuring work in Kotlin,
and don't help in Objective-C or Swift.

Calling them manually from Objective-C or Swift doesn't make much sense.
So now we deprecate this, in order to remove these methods from
Objective-C header completely later.

^KT-42641
^KT-49516 Fixed

kotlin-native/backend.native/tests/objcexport/dataClassComponentMethods.kt

@@ -0,0 +1,16 @@
+/*
+ * Copyright 2010-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+package dataClassComponentMethods
+
+data class DataClassWithComponentMethods(val x: Int, val y: Int)
+
+class RegularClassWithComponentMethods {
+    fun component1() = 3
+    fun component3() = 4
+}
+
+fun component1() = 5
+fun component4() = 6