The cctest enables concurrent-sparplug during startup, which creates
a job_handler_, then disables the flag before destroying the isolate,
which calls the destructor of ConcurrentBaselineCompiler.
This does not call job_handle_->Cancel and fails in a DCHECK inside
the default_job implementation.

Bug: v8:12054
Change-Id: I8975e2ad2c0aafaa86aedb13018617a08f0fded9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3234718
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77475}