Reland "Reland "Reuse arch/mode discovery in deopt fuzzer""

This is a reland of 5442e8b2
Original change's description:
> Reland "Reuse arch/mode discovery in deopt fuzzer"
> 
> This is a reland of a24c7c9a
> Original change's description:
> > Reuse arch/mode discovery in deopt fuzzer
> > 
> > Bug: v8:6917
> > Change-Id: I1b7169c8702c8649812b17579d38d64de676ed60
> > Reviewed-on: https://chromium-review.googlesource.com/723420
> > Commit-Queue: Michał Majewski <majeski@google.com>
> > Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#48838}
> 
> Bug: v8:6917
> Change-Id: I03b2c288257d44c2df9d0fa6cf4750d1c5719d59
> Reviewed-on: https://chromium-review.googlesource.com/735719
> Commit-Queue: Michał Majewski <majeski@google.com>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48916}

Bug: v8:6917
Change-Id: I81419466d359b786c2a1b3a9aad3a86ed136f6f0
Reviewed-on: https://chromium-review.googlesource.com/738252Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michał Majewski <majeski@google.com>
Cr-Commit-Position: refs/heads/master@{#48997}