Add more logging to the Rollout Scorer

[jonfortescue]

I was not able to locally reproduce the Rollout Scorer not picking up issues like it has on a few scorecards (per #10188) -- both the rollout scorer console app and the Azure Function (run locally) produce the correct results. This suggests that the issue purely lies in the function when running in Azure. The best way to determine this, however, is to run the app in staging.

This PR adds a ton of AppInsights logging to the rollout scorer to help with debugging these things in prod & staging. This should make debugging much easier.

Logging added:

• Raw AzDO queries (uris, no auth or headers)
• Hotfix & rollback detection (from commit messages)
• GitHub API query & number of issues returned
• [TRACE] Logs looping over every issue noting labels for all
• Rollout issue/hotfix/rollback/downtime detection form GitHub issues
• Build time to rollout calculation
• [TRACE] Start/end/approval times for builds
• Downtime calculation
• Failure detection -- logs last build w/ link & its result status

[missymessa]

The only nit I have is the use of the name Utilities for logging, but that's how you already had it set up. Just seems a little weird to me. NBD, though.

LGTM

[jonfortescue]

While I was here, I added a case for failure detection if the last rollout is a rollback.

Actually, just going to merge this and put it in the other PR.