[KLIB] Keep order of constant properties depending on backend

- Fix K/N performance regression

compiler/ir/serialization.common/src/org/jetbrains/kotlin/backend/common/serialization/IrFileSerializer.kt

@@ -1269,6 +1269,7 @@ open class IrFileSerializer(
 
     open fun backendSpecificExplicitRoot(declaration: IrFunction) = false
     open fun backendSpecificExplicitRoot(declaration: IrClass) = false
+    open fun keepOrderOfProperties(property: IrProperty): Boolean = !property.isConst
 
     fun serializeIrFile(file: IrFile): SerializedIrFile {
         val topLevelDeclarations = mutableListOf<SerializedDeclaration>()
@@ -1297,7 +1298,7 @@ open class IrFileSerializer(
         // Make sure that all top level properties are initialized on library's load.
         file.declarations
             .filterIsInstance<IrProperty>()
-            .filter { it.backingField?.initializer != null }
+            .filter { it.backingField?.initializer != null && keepOrderOfProperties(it) }
             .forEach { proto.addExplicitlyExportedToCompiler(serializeIrSymbol(it.backingField!!.symbol)) }
 
         // TODO: Konan specific

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/lower/serialization/ir/JsIrFileSerializer.kt

@@ -8,9 +8,14 @@ package org.jetbrains.kotlin.ir.backend.js.lower.serialization.ir
 import org.jetbrains.kotlin.backend.common.LoggingContext
 import org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer
 import org.jetbrains.kotlin.backend.common.serialization.DeclarationTable
+import org.jetbrains.kotlin.ir.declarations.IrProperty
 
 class JsIrFileSerializer(
     logger: LoggingContext,
     declarationTable: DeclarationTable,
     bodiesOnlyForInlines: Boolean = false
-) : IrFileSerializer(logger, declarationTable, bodiesOnlyForInlines)
+) : IrFileSerializer(logger, declarationTable, bodiesOnlyForInlines) {
+
+    // Temporary keep order of any property, even of constants
+    override fun keepOrderOfProperties(property: IrProperty): Boolean = true
+}