ci: run csda tests

[akiver]

Run the https://github.com/akiver/cs-demo-analyzer tests in parallel from the CI workflow.
The purpose is to detect possible regressions.

Tests take ~2m20 when demos are cached and ~3m20 otherwise.
The cache will hit most of the time as new demos are not added very often.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.12%. Comparing base (c1e18e8) to head (4a07b28).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #542   +/-   ##
=======================================
  Coverage   81.12%   81.12%           
=======================================
  Files          47       47           
  Lines        6479     6479           
=======================================
  Hits         5256     5256           
  Misses       1005     1005           
  Partials      218      218           

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