[Bug 48030] New: Retrieve the reports/logs while the task runs

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48030

Bug ID: 48030
           Summary: Retrieve the reports/logs while the task runs
           Product: Wine-Testbot
           Version: unspecified
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Currently the TestBot only retrieves the task reports and logs once the VM-side
script running the tests has completed (or timed out).

It could be better to start downloading the reports and logs earlier,
retrieving additional chunks as the files grow:
* The developer could get feedback a bit sooner (but presenting partial results
may require adjustments, particularly one should avoid errors such as 'it looks
like the report has been truncated').
* The download could happen concurrently with the task running which could
provide a small speedup.
* The TestBot would at least get a partial report if the test causes the VM to
crash, though that would likely not be the most interesting part.
* If taking multiple screenshots (see bug 44709) we'd also likely want to start
downloading them before the test has completed. We would not necessarily need
to download them piecemeal but this would still imply interleaving GetFile()
RPCs with the Wait() one.

In all cases we'd want to limit the time we get stuck in GetFile().