add functionality to delete record from ats when cleaning runs

[yiwen-h]

Closes #31

Previously when cancelling runs with nhp_aci clean command, the container and the params file would be deleted but the record would remain on ATS, forever showing status: running

This PR deletes the ATS record when a model run is cleaned.

Alternative would be to mark the ATS record status as Cancelled - would this be preferred?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c91b228) to head (f5dfedb).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #32   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        11           
  Lines          352       361    +9     
  Branches        37        37           
=========================================
+ Hits           352       361    +9     

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