Split up generation of test data for codegen/box/ranges into signed and

unsigned ranges/progressions.

The tests pass in JVM_IR for signed, but fail for unsigned due to
inlining being broken. We can disable the JVM_IR tests for unsigned,
while keeping them enabled for signed, to get better test coverage in
the interim until inlining is fixed.

compiler/testData/codegen/box/ranges/unsigned/expression/overflowZeroDownToMaxValue.kt

@@ -0,0 +1,31 @@
+// KJS_WITH_FULL_RUNTIME
+// Auto-generated by org.jetbrains.kotlin.generators.tests.GenerateRangesCodegenTestData. DO NOT EDIT!
+// WITH_RUNTIME
+
+
+const val MaxUI = UInt.MAX_VALUE
+const val MaxUL = ULong.MAX_VALUE
+
+fun box(): String {
+    val list1 = ArrayList<UInt>()
+    val range1 = 0u downTo MaxUI step 3
+    for (i in range1) {
+        list1.add(i)
+        if (list1.size > 23) break
+    }
+    if (list1 != listOf<UInt>()) {
+        return "Wrong elements for 0u downTo MaxUI step 3: $list1"
+    }
+
+    val list2 = ArrayList<ULong>()
+    val range2 = 0uL downTo MaxUL step 3
+    for (i in range2) {
+        list2.add(i)
+        if (list2.size > 23) break
+    }
+    if (list2 != listOf<ULong>()) {
+        return "Wrong elements for 0uL downTo MaxUL step 3: $list2"
+    }
+
+    return "OK"
+}