Make TransportServer tests run in parallel

[jjngx]

Proposed changes

This PR introduces following changes:

• TransportServer tests are executed in parallel
• Negative and positive (happy) test paths are grouped in separate table tests

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[codecov]

Codecov Report

Merging #3892 (86a93fa) into main (ab67547) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3892      +/-   ##
==========================================
+ Coverage   51.94%   51.95%   +0.01%     
==========================================
  Files          59       59              
  Lines       16742    16742              
==========================================
+ Hits         8696     8698       +2     
+ Misses       7748     7746       -2     
  Partials      298      298              

see 1 file with indirect coverage changes

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