Add last_passed_on and description in regression_test table

[Tarun-Arora]

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This PR is a step to improve regression test results, by enabling when each regression test was last passed on the master branch
Also adding a description field for regression tests to help developers with the importance of a test

FRONTEND CHECK FOR MAX DESCRIPTION LENGTH

[thealphadollar]

Aha! Thanks for the PR. Please have a look at the suggestions.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.22% 🎉

Comparison is base (d30129e) 85.76% compared to head (7f71832) 85.98%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #853      +/-   ##
==========================================
+ Coverage   85.76%   85.98%   +0.22%     
==========================================
  Files          35       35              
  Lines        3617     3624       +7     
  Branches      729      729              
==========================================
+ Hits         3102     3116      +14     
+ Misses        378      372       -6     
+ Partials      137      136       -1     

Flag	Coverage Δ
unittests	85.98% <100.00%> (+0.22%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
mod_ci/controllers.py	81.19% <100.00%> (+0.04%)	⬆️
mod_regression/controllers.py	97.32% <100.00%> (+3.17%)	⬆️
mod_regression/forms.py	100.00% <100.00%> (ø)
mod_regression/models.py	100.00% <100.00%> (ø)

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[Tarun-Arora]

This PR is ready to be reviewed, I might need to add some unittests, I'll do that
I'll test PR comments on spdev.ccextractor.org before merging this

[thealphadollar]

LGTM. I've left two small doubts, please check 🙏🏽

[Tarun-Arora]

This is tested as well now, see comment: CCExtractor/ccextractor#1509 (comment)
and notice line:
ccextractor -svc 1[EUC-KR] -out=txt -noru b5d6aad89f..., Last passed: Test 1

[thealphadollar]

LGTM.