chore: upload xline logs if validation failed

[themanforfree]

Please briefly answer these questions:

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?)
  upload xline logs if validation failed
• what changes does this pull request make?
  upload xline logs if validation failed
• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc)
  no

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fa656ad) 64.40% compared to head (e0a388c) 79.07%.
Report is 9 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #573       +/-   ##
===========================================
+ Coverage   64.40%   79.07%   +14.67%     
===========================================
  Files         105      154       +49     
  Lines       18802    21284     +2482     
  Branches    18802        0    -18802     
===========================================
+ Hits        12109    16830     +4721     
+ Misses       5955     4454     -1501     
+ Partials      738        0      -738     

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[Phoenix500526]

LGTM