Archive unit test logs

[vitodb]

In case of unit test failure archive logs
and make them available as artifacts.
This action step is enabled only in case unit test step fails and is not cancelled.

[codecov]

Codecov Report

Merging #643 (e4d7d77) into master (e94c2ab) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #643   +/-   ##
=======================================
  Coverage   97.26%   97.26%           
=======================================
  Files          49       49           
  Lines        2889     2889           
  Branches      460      460           
=======================================
  Hits         2810     2810           
  Misses         53       53           
  Partials       26       26           

Flag	Coverage Δ
python-3.10	96.98% <ø> (ø)
python-3.6	96.69% <ø> (ø)

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