This adds the benchmarks suite to the deopt fuzzer and removes the
obsolete deopt configs, which since a while are part of the num-fuzz
configs.

TBR=sergiyb@chromium.org

Bug: v8:6900
Change-Id: I9202e2a66a132eca5940b4444fda97816b034e54
Reviewed-on: https://chromium-review.googlesource.com/876085
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50720}