[MISC] Reenable labelling tests

[dragomirp]

Re-enable the label upgrade test from master to primary

Cannot re-enable the roll back test, since the dependency fault charm is local and cannot be upgraded to the specific revision (281)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.65%. Comparing base (b5711ae) to head (6421fe8).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #728   +/-   ##
=======================================
  Coverage   70.65%   70.65%           
=======================================
  Files          11       11           
  Lines        2999     2999           
  Branches      523      523           
=======================================
  Hits         2119     2119           
  Misses        767      767           
  Partials      113      113           

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