Allow software installers with unknown versions through rather than failing the upload

[iansltx]

For #25201.

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• 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

[iansltx]

This is in draft pending a product decision on whether this is how we solve #25201, where the EXE provided has no version information at all.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.59%. Comparing base (ca15cbe) to head (8b2c283).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #25426   +/-   ##
=======================================
  Coverage   63.58%   63.59%           
=======================================
  Files        1619     1619           
  Lines      154939   154936    -3     
  Branches     4038     4038           
=======================================
  Hits        98524    98524           
+ Misses      48646    48644    -2     
+ Partials     7769     7768    -1     

Flag	Coverage Δ
backend	64.43% <100.00%> (+<0.01%)	⬆️
frontend	53.21% <ø> (ø)

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