Even though both are allowed in the style guide, it recommends to use
'using', as its syntax is more consistent with the rest of C++.
This CL turns all typedefs in interpreter code to 'using' declarations.

R=leszeks@chromium.org

Bug: v8:8834
Change-Id: Ide1e8a35a56a840b36b3ceab1307df1bcab94acd
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1545900Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60609}