updater/driver: add the ability to signal "removal" in an update

[hdonnay]

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 55.82%. Comparing base (ffcb29e) to head (4fb218e). Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1179      +/-   ##
==========================================
- Coverage   55.86%   55.82%   -0.05%     
==========================================
  Files         266      266              
  Lines       16625    16625              
==========================================
- Hits         9288     9281       -7     
- Misses       6374     6379       +5     
- Partials      963      965       +2     

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