This adds Python logging to several code locations that previously
used to just print. The locations aren't yet complete. The changed
code locations should help for investigating hanging test runs.

The default level is WARNING for running tests locally, and INFO
when called from bots that pass the --swarming parameter.

Bug: v8:13113
Change-Id: If3a336703e7c346a5c718f2359b1a80e37e1ca6d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3876183
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Alexander Schulze <alexschulze@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83006}