Support Long and Char in const-bounded counter loop generation

If the loop end value is a compile-time constant (best we can do now),
and it is safe to iterate over a given range using "naive" for loop
(using '<=' or '>=' in loop condition),
generate such loops for Longs and Chars as well Ints (Bytes, Shorts).

compiler/testData/codegen/bytecodeText/forLoop/forInRangeToCharConst.kt

@@ -0,0 +1,12 @@
+const val N = 'Z'
+
+fun test(): Int {
+    var sum = 0
+    for (i in 'A' .. N) {
+        sum += i.toInt()
+    }
+    return sum
+}
+
+// 0 IF_ICMPEQ
+// 1 IF_ICMPGT