Fix deadlock: reduce number rows deleted at per iter, add retry

[dantecatalfamo]

#27002

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.
  See Changes files for more information.
• 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)
  • Make sure cron completes successfully with thousands of unsaved expired queries
• Manual QA for all new/changed functionality

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.98%. Comparing base (6bbf645) to head (5ab2cd2).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #27027      +/-   ##
==========================================
- Coverage   63.99%   63.98%   -0.01%     
==========================================
  Files        1704     1705       +1     
  Lines      162237   162796     +559     
  Branches     4327     4327              
==========================================
+ Hits       103822   104164     +342     
- Misses      50346    50518     +172     
- Partials     8069     8114      +45     

Flag	Coverage Δ
backend	64.74% <100.00%> (-0.02%)	⬇️

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