Detect and report inner classes capturing script instance

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

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