Detect and report inner classes capturing script instance

compiler/testData/codegen/script/scriptInstanceCapturing/nestedToObjectClassCapturesProperty.kts

@@ -0,0 +1,15 @@
+// IGNORE_BACKEND: JS, JS_IR, JS_IR_ES6, NATIVE, WASM
+// IGNORE_BACKEND: JVM, JVM_IR
+
+// expected: rv: abc
+
+// KT-19423 variation
+val used = "abc"
+
+object Outer {
+    class User {
+        val property = used
+    }
+}
+
+val rv = Outer.User().property