feat: add inconclusive test support

[eddycharly]

Explanation

Add inconclusive test support.

[codecov]

Codecov Report

Attention: Patch coverage is 56.00000% with 22 lines in your changes missing coverage. Please review.

Project coverage is 58.27%. Comparing base (2f3c548) to head (1ee7fe8).
Report is 97 commits behind head on main.

Files	Patch %	Lines
pkg/runner/processors/step.go	45.00%	11 Missing ⚠️
pkg/runner/processors/test.go	28.57%	5 Missing ⚠️
pkg/runner/processors/tests.go	42.85%	4 Missing ⚠️
pkg/runner/failer/failer.go	83.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1571   +/-   ##
=======================================
  Coverage   58.27%   58.27%           
=======================================
  Files         161      161           
  Lines        6416     6438   +22     
=======================================
+ Hits         3739     3752   +13     
- Misses       2318     2326    +8     
- Partials      359      360    +1     

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