The stack of the wasm interpreter was stored in a zone. However, when
the stack grows, the previous memory of the stack cannot be reused.
With this CL we allocate the stack on the C++ heap to remove this memory
leak.

R=clemensh@chromium.org

Bug: chromium:856594
Change-Id: Idce22c5c1732f7097fc4281c73174892c95f49e2
Reviewed-on: https://chromium-review.googlesource.com/1126301
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54238}