Log message source details are grouped

[majorosdonat]

Log message source details are grouped: they are not relevant for most users and can distract them from finding the root cause of their errors.

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[jscheffl]

Thanks for the fix, looks good for me - also valid to back-port to 2.10 line in my view.

@bbovenzi would it be okay to back-port also for you?

We had a couple of complaints from users who had (1) error markers in logs in UI even marked in red just because the celery worker was not delivering the logs internally - but logs were loaded from file successfully and (2) if logs were archived on blob storage the internal blob storage URL was posted which actually is not accessible for users.

So the first lines posted in the logs mainly confused and were not helpful... Donat came to the proposal to hide/log group them per default.

[majorosdonat]

Moved back to draft until pytests are fixed

[bbovenzi]

Makes sense to me!