This reverts commit b7f0951f.

Reason for revert: https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux64%20TSAN/21517

Original change's description:
> [wasm] Add a separate CodeTracer to the WasmEngine.
> 
> This makes sure the TurboFan pipeline is independent of the Isolate by
> getting the CodeTracer from the WasmEngine for WebAssembly compilations.
> 
> R=​clemensh@chromium.org
> 
> Change-Id: I343af1a2bfaeff77e2f41ef0c53fbfe165e2e202
> Reviewed-on: https://chromium-review.googlesource.com/1134997
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54455}

TBR=mstarzinger@chromium.org,clemensh@chromium.org

Change-Id: I5f69f12ab29dcb92e7b7f53632eb73a3abc1f6af
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/1138113Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54459}