KT-6136 VerifyError on data class inheriting from trait

- coerce property values to proper data class component types
- add tests
 #KT-6136 Fixed

compiler/testData/codegen/box/classes/kt6136.kt

@@ -0,0 +1,26 @@
+trait Id<T> {
+    val id: T
+}
+
+open data class Actor (
+        override val id: Int,
+        val firstName: String,
+        val lastName: String
+) : Id<Int>
+
+fun box(): String {
+    val a1 = Actor(1, "Jeff", "Bridges")
+
+    val a1c = a1.copy()
+    if (a1c.id != a1.id) return "Failed: a1.copy().id==${a1c.id}"
+
+    val a2 = Actor(2, "Jeff", "Bridges")
+    if (a2 == a1) return "Failed: a2==a1"
+
+    // Assume that our hashCode is good enough for this test :)
+    if (a2.hashCode() == a1.hashCode()) return "Failed: a2.hashCode()==a1.hashCode()"
+
+    a1.toString()
+
+    return "OK"
+}

compiler/testData/codegen/box/classes/kt6136_2.kt

@@ -0,0 +1,20 @@
+interface Id<T> {
+    val id: T
+}
+
+open data class Actor (
+        id: Int,
+        val firstName: String,
+        val lastName: String
+) : Id<Int> {
+    override val id: Int = id
+}
+
+fun box(): String {
+    val a1 = Actor(1, "Jeff", "Bridges")
+    val a1copy = a1.copy(id = a1.id)
+
+    if (a1copy.id != a1.id) return "Failed: a1copy.id==${a1copy.id}"
+
+    return "OK"
+}