Added a new compilation unit for Wasm interpreter in order to make it
a first-class tier in the future. Adapted Wasm interpreter usage to
work with the new interface. The new compilation unit is currently
not used.

Change-Id: Ib9e1d0dc6ca1b03467cc43059f03ce153bb96400
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1514734
Commit-Queue: Frederik Gossen <frgossen@google.com>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60183}