Add a test that does the same thing the devtools-frontend does when
evaluating console inputs.

1) Declare a const variable with throwOnSideEffect=true. This should
throw.
2) Declare the same const variable with throwOnSideEffect=false.
This should successfully declare the variable.

Previously it could be the case that even though we threw in 1), the
variable would fail to be initialized in 2) with a re-declaration
error.

Bug: chromium:1043151
Change-Id: I1a6126b518f7bb3788c39b9f8e3adb8850aa962a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2016587
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65991}