Revert of [wasm] further simplification of WasmCompiledModule (patchset #1 id:1 of https://codereview.chromium.org/2381393002/ )

Reason for revert:
Failures on multiple bots (e.g. https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/8887)

Original issue's description:
> [wasm] further simplification of WasmCompiledModule
>
> Calculate memory size from the available heap. This avoids
> the bugs due to some numbers being stored as objects (by-ref)
> and thus needing special handling when cloning.
>
> This leaves all the rest of the numbers as read-only.
>
> Further simplified by representing globals size as a Smi.
>
> BUG=
>
> Committed: https://crrev.com/7ced1bdc9df2315ccc07dd17c12736aebf40cb57
> Cr-Commit-Position: refs/heads/master@{#39923}

TBR=bradnelson@google.com,bradnelson@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review-Url: https://codereview.chromium.org/2385943002
Cr-Commit-Position: refs/heads/master@{#39924}