Treat number with unsigned literal as UByte & UShort & UInt & ULong

compiler/testData/codegen/box/inlineClasses/checkBasicUnsignedLiterals.kt

@@ -0,0 +1,16 @@
+// !LANGUAGE: +InlineClasses
+// !SKIP_METADATA_VERSION_CHECK
+// WITH_UNSIGNED
+
+fun box(): String {
+    val u1 = 1u
+    val u2 = 2u
+    val u3 = u1 + u2
+    if (u3.toInt() != 3) return "fail"
+
+    val max = 0u.dec().toLong()
+    val expected = Int.MAX_VALUE * 2L + 1
+    if (max != expected) return "fail"
+
+    return "OK"
+}

compiler/testData/codegen/box/inlineClasses/checkPlusOfUInt.kt

@@ -1,11 +0,0 @@
-// !LANGUAGE: +InlineClasses
-// !SKIP_METADATA_VERSION_CHECK
-// WITH_UNSIGNED
-
-@Suppress("INVISIBLE_MEMBER")
-fun box(): String {
-    val u1 = UInt(1)
-    val u2 = UInt(2)
-    val u3 = u1 + u2
-    return if (u3.toInt() == 3) "OK" else "fail"
-}