Add delegate-stx command

[BowTiedRadone]

This PR adds the delegate-stx command to the stateful property testing environment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.18%. Comparing base (b86104d) to head (79b28b5).

Additional details and impacted files

@@                           Coverage Diff                            @@
##           feat/pox-4-stateful-property-testing    #4552      +/-   ##
========================================================================
- Coverage                                 77.13%   67.18%   -9.96%     
========================================================================
  Files                                       453      453              
  Lines                                    328342   328342              
  Branches                                    323      323              
========================================================================
- Hits                                     253277   220591   -32686     
- Misses                                    75057   107743   +32686     
  Partials                                      8        8              

see 290 files with indirect coverage changes

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[moodmosaic]

This PR is part of #4548 and can be merged as-is since it targets feat/pox-4-stateful-property-testing (#4550).

[blockstack-devops]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.