Fixup View::access() truncate parameter pack

[dalg24]

Fix #4862

In #4800, I elected to forward all arguments from the parameter pack in View::access to the underlying ViewMapping implementation and relied on it being able to handle extra arguments. Sacado's specialization of ViewMapping (which only allow up to rank-7) did not implement an access template function that takes 8 arguments.
Here, I propose, in some sense, to rollback part of the changes from #4800, by truncating the extra arguments before accessing elements using ViewMapping.
Note that I considered a more generic approach but gave up mainly because it clashes with our current implementation that does not trust the compiler to properly inline.