[turbofan] Introduce Oddball::to_number_raw and use it for change lowering.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 51fb1330614237fe6a1e735d9ff5d44798fd552e..ba7113720711b5a5dd4edcc7166845e88118cdb9 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -7337,7 +7337,7 @@ class Internals {
       1 * kApiPointerSize + kApiIntSize;
   static const int kStringResourceOffset = 3 * kApiPointerSize;
 
-  static const int kOddballKindOffset = 5 * kApiPointerSize;
+  static const int kOddballKindOffset = 5 * kApiPointerSize + sizeof(double);
   static const int kForeignAddressOffset = kApiPointerSize;
   static const int kJSObjectHeaderSize = 3 * kApiPointerSize;
   static const int kFixedArrayHeaderSize = 2 * kApiPointerSize;