FIR: Fix VerifyError caused by private delegates

^KT-45048 Fixed

compiler/testData/codegen/box/delegatedProperty/privateInSubClass.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+// WITH_RUNTIME
+
+open class A {
+    private val _myVal by lazy {
+        "1" + "2"
+    }
+}
+
+class B : A() {
+    private val _myVal by lazy {
+        "O" + "K"
+    }
+
+    fun res() = _myVal
+}
+
+fun box(): String {
+    return B().res()
+}