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

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

@@ -0,0 +1,18 @@
+// WITH_RUNTIME
+
+class ComparablePair<T : Comparable<T>>(val first: T, val second: T) : Comparable<ComparablePair<T>> {
+    override fun compareTo(other: ComparablePair<T>): Int {
+        val result = first.compareTo(other.first)
+        return if (result != 0) result else second.compareTo(other.second)
+    }
+}
+
+fun box(): String {
+    assert("a" !in "b".."c")
+    assert("b" in "a".."d")
+
+    assert(ComparablePair(2, 2) !in ComparablePair(1, 10)..ComparablePair(2, 1))
+    assert(ComparablePair(2, 2) in ComparablePair(2, 0)..ComparablePair(2, 10))
+
+    return "OK"
+}