fix: move logic for mutating software versions so that Fleet shows the expected versions

[jahzielv]

For #24784

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.
• 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

Attention: Patch coverage is 81.10236% with 24 lines in your changes missing coverage. Please review.

Project coverage is 63.96%. Comparing base (e7b1409) to head (9aab122).

Files with missing lines	Patch %	Lines
server/vulnerabilities/nvd/cpe.go	81.10%	18 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #26789      +/-   ##
==========================================
- Coverage   63.99%   63.96%   -0.04%     
==========================================
  Files        1695     1695              
  Lines      161583   161626      +43     
  Branches     4353     4353              
==========================================
- Hits       103405   103379      -26     
- Misses      50154    50219      +65     
- Partials     8024     8028       +4     

Flag	Coverage Δ
backend	64.73% <81.10%> (-0.04%)	⬇️

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