KT-5044 implement missing Range#contains tests and move it to separate package

compiler/testData/codegen/box/ranges/contains/inRangeWithCustomContains.kt

@@ -0,0 +1,24 @@
+// WITH_RUNTIME
+
+class Value(val x: Int) : Comparable<Value> {
+    override fun compareTo(other: Value): Int {
+        throw AssertionError("Should not be called")
+    }
+}
+
+class ValueRange(override val start: Value,
+                 override val endInclusive: Value) : ClosedRange<Value> {
+
+    override fun contains(value: Value): Boolean {
+        return value.x == 42
+    }
+}
+
+operator fun Value.rangeTo(other: Value): ClosedRange<Value> = ValueRange(this, other)
+
+fun box(): String {
+    assert(Value(42) in Value(1)..Value(2))
+    assert(Value(41) !in Value(40)..Value(42))
+
+    return "OK"
+}