Typescript - fix parsing of tf responses and improve error handling

[jamacku]

Let's parse only parts of JSON responses from TF that we use - fixes https://github.com/sclorg/nginx-container/actions/runs/7005842261

Also, set the status to error when we catch some.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a462b66) 94.15% compared to head (3aa3e32) 94.45%.

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Additional details and impacted files

@@              Coverage Diff               @@
##           typescript      #85      +/-   ##
==============================================
+ Coverage       94.15%   94.45%   +0.29%     
==============================================
  Files               3        4       +1     
  Lines             428      451      +23     
  Branches           35       35              
==============================================
+ Hits              403      426      +23     
  Misses             25       25              

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