Cancel Running TF Test Requests when action was canceled 🚥

[jamacku]

TODO:

• Tests
• E2E testing

Fixes:

• RFE: Cancel Action run when the newer request was received; Consume fewer GitHub/TF resources #119

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2e246ab) 99.18% compared to head (a30eac0) 99.29%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #121      +/-   ##
==========================================
+ Coverage   99.18%   99.29%   +0.10%     
==========================================
  Files           6        8       +2     
  Lines         491      564      +73     
  Branches       53       61       +8     
==========================================
+ Hits          487      560      +73     
  Misses          4        4              

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[zmiklank]

Thanks for this PR. Please see my comments.
Also could you please add a brief information to readme, about need of setting:

concurrency: 
  group: ${{ github.head_ref }}
  cancel-in-progress: true

in the users' action in order for this new functionality to work?

[zmiklank]

Also could you please add a brief information to readme, about need of setting:

concurrency: 
  group: ${{ github.head_ref }}
  cancel-in-progress: true

in the users' action in order for this new functionality to work?

Sorry, now I see there is separate PR for the docs part.

[zmiklank]

Thank you for your contribution. LGTM.