This reverts commit 44efa00b.

Reason for revert: Breaks MSVC with warning as error:
https://ci.chromium.org/p/v8/builders/ci/V8%20Win64%20-%20msvc/15903

Original change's description:
> [wasm][memory64] Decode memory offset as 64-bit LEB
>
> After preparing Liftoff, TurboFan, and the interpreter for this change,
> we now store the memory offset as uint64_t. {LoadLane} and {StoreLane}
> were added after the TurboFan refactoring, so those two are adapted
> similar to the other memory operations.
>
> R=​manoskouk@chromium.org
>
> Bug: v8:10949
> Change-Id: Iba66ce448904e23b152fcb8612d171124e615473
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2555006
> Commit-Queue: Clemens Backes <clemensb@chromium.org>
> Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#71382}

TBR=clemensb@chromium.org,manoskouk@chromium.org

Change-Id: Ia0f46a0b6fd2102a61c7664d7cdd86a2cf8ddb24
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:10949
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2558752Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71383}