feat: update notifications with more information for build states

[shreddedbacon]

General Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

Database Migrations

• If your PR contains a database migation, it MUST be the latest in date order alphabetically

Updates the notification service to produce warning message if a build reaches the state of complete with warnings and indicates that the build completed with warnings and to check the logs for further information.

Additionally, if a build fails, the step at which it failed will be included in the notification now.

For the webhook type notifications, failures also include the buildStep at which it failed. Completed webhook notifications include a new field warning: true if the build has warnings.

Closing issues

closes #3819 (partially anyway)