Add additional invariant to check in Range.contains optimization tests.

Change expectations for double and float ranges according to #KT-4481
 #KT-5044 #KT-4481

Custom 'rangeTo' might be unoptimized, but still 'in' should not diverge from 'contains'.

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

@@ -5,7 +5,10 @@
 
 fun check(x: Int, left: Int, right: Int): Boolean {
     val result = x in left..right
-    assert(result == checkUnoptimized(x, left..right))
+    val manual = x >= left && x <= right
+    val range = left..right
+    assert(result == manual) { "Failed: optimized === manual for $range" }
+    assert(result == checkUnoptimized(x, range)) { "Failed: optimized === unoptimized for $range" }
     return result
 }