4th attempt to reland this after this revert:
https://chromium-review.googlesource.com/c/v8/v8/+/1680553

Required fixes for default values in arrow function parameters and for
eval scopes:
https://chromium-review.googlesource.com/c/v8/v8/+/1710671
https://chromium-review.googlesource.com/c/v8/v8/+/1733077

Original change's description:
> Enable lazy source positions by default
>
> Also adds a compile time flag which allows the default to be configured
> so node can disable it since it hangs the node cpu profiler tests.

Bug: v8:8510
Change-Id: I20fd82f636527e405d73fd5941b1b4c2f134b666
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1733078
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63052}