Improve view of intermediate build results on testresults.qt.io

Right now before build finishes its testresults.qt.io page contains very little information: yellow bar indicating that it's in progress, datetime of start, and link to Gerrit.

It would be great to have more info. I understand that it might be impossible to upload loags before they are finalized, hower it should be possible to show everything else. In particular, status of provisioning (ideally with logs after it's finished) and status (done or still integrating, datetime of start) of individual build jobs.