After last refactoring of ETW generation, I introduced a regression
in the method that checks when SourceLoad should happen, and
reverted the condition used to know if a new SourceLoad should
happen.

Bug: v8:12932
Change-Id: I69f5d0700f6af9b124bb0f55750c8d91e56e9e0d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3762585Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: José Dapena Paz <jdapena@igalia.com>
Cr-Commit-Position: refs/heads/main@{#81741}