Fix "not initialized" on lateinit property (KT-9369)

compiler/testData/diagnostics/tests/LateInit.kt

@@ -54,4 +54,12 @@ public abstract class AbstractClass {
 
 public class AbstractClassImpl : AbstractClass() {
     override lateinit var str: String
+}
+
+public class B {
+    lateinit var a: String
+
+    init {
+        a.length()
+    }
 }

compiler/testData/diagnostics/tests/LateInit.txt

@@ -45,6 +45,14 @@ public final class AbstractClassImpl : AbstractClass {
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
+public final class B {
+    public constructor B()
+    public final lateinit var a: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
 public final class CustomDelegate {
     public constructor CustomDelegate()
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean