Tear down DKG components in case of EFM recovery

[jordanschalm]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.71%. Comparing base (d0c9695) to head (0bda324).

Additional details and impacted files

@@                   Coverage Diff                    @@
##           feature/efm-recovery    #6756      +/-   ##
========================================================
+ Coverage                 41.70%   41.71%   +0.01%     
========================================================
  Files                      2030     2030              
  Lines                    180462   180462              
========================================================
+ Hits                      75261    75284      +23     
+ Misses                    99003    98985      -18     
+ Partials                   6198     6193       -5     

Flag	Coverage Δ
unittests	41.71% <ø> (+0.01%)	⬆️

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[jordanschalm]

Closing. Moved doc improvements to a PR targeting master: #6758. Added notes about controller shutdown to #6729