This CL changes the WasmGraphBuilder interface to accept 64-bit memory
offsets, and adapts the implementation to handle them correctly.

R=manoskouk@chromium.org

Bug: v8:10949
Change-Id: Ifd42edc855c9283ef69522663c735ab31c3d54f3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2445474Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70331}