[enhancement] Include log files in the run report

[ekouts]

Closes #2811 .

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (c51df88) 86.79% compared to head (10ff51c) 86.79%.

❗ Current head 10ff51c differs from pull request most recent head 95a599f. Consider uploading reports for the commit 95a599f to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2828   +/-   ##
=======================================
  Coverage   86.79%   86.79%           
=======================================
  Files          60       60           
  Lines       11348    11348           
=======================================
  Hits         9850     9850           
  Misses       1498     1498           

Impacted Files	Coverage Δ
reframe/frontend/cli.py	76.62% <ø> (ø)
reframe/frontend/runreport.py	94.61% <100.00%> (ø)

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