JVM IR: Fix handling of anonymous initializers in inline classes (#4372)

Fixes KT-46554

compiler/testData/codegen/box/inlineClasses/classInInlineClassInit.kt

@@ -0,0 +1,17 @@
+var result = "Fail"
+
+inline class A(val value: String) {
+    init {
+        class B {
+            init {
+                result = value
+            }
+        }
+        B()
+    }
+}
+
+fun box(): String {
+    A("OK")
+    return result
+}