test-heap-profiler/AllocationSitesAreVisible was disabled unnecessarily
for quite some time. With a minor fix, it's possible to validate that
an AllocationSite can be seen through the heap profiler interface.

Change-Id: I0ac6c218da12ab268bd08c65926149f5c00e5b06
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2474778
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70537}