Remove the --zap_code_space flag and always patch deopted code to hard fail
if called.

Also, as a drive-by add deopt code patching for Arm64.

BUG=v8:6246

Change-Id: Ibf1bc53692dbbe618132100a66c56a88c97fd62b
Reviewed-on: https://chromium-review.googlesource.com/496127Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45082}