Add DefaultProgressionHandler that handles for-loops over

non-specialized progressions, including "step" progressions.

DefaultProgressionHandler uses the "first/last/step" properties of
the progression when building the loop header.

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

@@ -11,3 +11,4 @@ fun Int.digitsUpto(end: Int): Int {
 // 0 getEnd
 // 0 getFirst
 // 0 getLast
+// 0 getStep