v8: backport a9e56f4f36d from upstream v8

Because 5.8 still had other uses of the removed flag, there are some extra
changes in Heap::ConfigureHeap and api.cc:SetResourceConstraints.

Original commit message:
    [heap] Remove max_executable_size resource constraint.

    BUG=chromium:716032

    Review-Url: https://codereview.chromium.org/2890603007
    Cr-Commit-Position: refs/heads/master@{#45400}

PR-URL: https://github.com/nodejs/node/pull/13217


Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>