Fix upcoming activities for ABM-deleted hosts

[dantecatalfamo]

#22353

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.
  See Changes files for more information.
• Input data is properly validated, SELECT * is avoided, SQL injection is prevented (using placeholders for values in statements)
• Added/updated automated tests
• A detailed QA plan exists on the associated ticket (if it isn't there, work with the product group's QA engineer to add it)
• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.60%. Comparing base (5f2b339) to head (1af9820).
Report is 27 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #25530      +/-   ##
==========================================
+ Coverage   63.59%   63.60%   +0.01%     
==========================================
  Files        1619     1620       +1     
  Lines      154980   155083     +103     
  Branches     3987     3987              
==========================================
+ Hits        98565    98648      +83     
- Misses      48646    48662      +16     
- Partials     7769     7773       +4     

Flag	Coverage Δ
backend	64.45% <100.00%> (+0.01%)	⬆️

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