IR: make lateinit lowering traverse local classes

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/lower/LateinitLowering.kt

@@ -36,6 +36,10 @@ import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
 
 class NullableFieldsForLateinitCreationLowering(val backendContext: CommonBackendContext) : DeclarationTransformer {
 
+    override fun lower(irFile: IrFile) {
+        runPostfix(true).toFileLoweringPass().lower(irFile)
+    }
+
     override fun transformFlat(declaration: IrDeclaration): List<IrDeclaration>? {
         if (declaration is IrField) {
             declaration.correspondingPropertySymbol?.owner?.let { property ->
@@ -52,6 +56,10 @@ class NullableFieldsForLateinitCreationLowering(val backendContext: CommonBacken
 // Transform declarations
 class NullableFieldsDeclarationLowering(val backendContext: CommonBackendContext) : DeclarationTransformer {
 
+    override fun lower(irFile: IrFile) {
+        runPostfix(true).toFileLoweringPass().lower(irFile)
+    }
+
     override fun transformFlat(declaration: IrDeclaration): List<IrDeclaration>? {
         when (declaration) {
             is IrProperty -> {

compiler/testData/codegen/box/properties/lateinit/localClass.kt

@@ -1,6 +1,4 @@
 // WITH_RUNTIME
-// IGNORE_BACKEND_FIR: JVM_IR
-// IGNORE_BACKEND: JVM_IR, JS_IR
 
 import kotlin.UninitializedPropertyAccessException