This reverts commit 884bec9f.

Reason for revert: https://logs.chromium.org/v/?s=chromium%2Fbb%2Fclient.v8%2FV8_Linux64_TSAN%2F20938%2F%2B%2Frecipes%2Fsteps%2FCheck%2F0%2Flogs%2Fgraceful_shutdown%2F0

Original change's description:
> [turbofan] enable switch jump tables with --no-untrusted-code-mitigations,
> also for stubs and Wasm
> 
> Bug: chromium:845851
> Change-Id: I9b860dc26f8b35d629235b82fc5fffe04bf10493
> Reviewed-on: https://chromium-review.googlesource.com/1076151
> Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53525}

TBR=mstarzinger@chromium.org,jarin@chromium.org,tebbi@chromium.org,ben.titzer@gmail.com

Change-Id: If24709e40bc6c442b88c8ba7b804775a9dfafc15
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:845851
Reviewed-on: https://chromium-review.googlesource.com/1087467Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53529}