Minor, add test case on metadata of lambdas in constructors

KT-41465

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnLambdaInConstructor.kt

@@ -0,0 +1,16 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.jvm.reflect
+
+class C {
+    val o = { O: String -> }
+    val k = { K: String -> }
+
+    constructor(y: Int)
+    constructor(y: String)
+}
+
+fun box(): String =
+    (C(0).o.reflect()?.parameters?.singleOrNull()?.name ?: "null") +
+            (C("").k.reflect()?.parameters?.singleOrNull()?.name ?: "null")