Fleet UI: Rollback follow-up re: default version selection

[RachelElysia]

Issue

Part of #31919

Description

Tighten up rollback version shown in UI

• Orders version array by newest to oldest using compareVersion
• Ensure latest copy uses compareVersion to ensure it is the latest
• Allow dropdown to be open if latest is shown
• Do not have label "Latest (x.x.x)" if there is only one option in the dropdown, just have it as "x.x.x"

Testing

• Added/updated automated tests

• QA'd all new/changed functionality manually

[codecov]

Codecov Report

❌ Patch coverage is 7.40741% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.34%. Comparing base (33c7448) to head (985d024).

Files with missing lines	Patch %	Lines
...ePage/components/forms/PackageForm/PackageForm.tsx	5.26%	18 Missing ⚠️
...twarePage/components/forms/PackageForm/helpers.tsx	16.66%	5 Missing ⚠️
frontend/hooks/useSoftwareInstallerMeta.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##           31919-rollback   #40282      +/-   ##
==================================================
- Coverage           66.35%   66.34%   -0.01%     
==================================================
  Files                2458     2458              
  Lines              197177   197193      +16     
  Branches             8621     8627       +6     
==================================================
+ Hits               130827   130828       +1     
- Misses              54506    54521      +15     
  Partials            11844    11844              

Flag	Coverage Δ
frontend	54.12% <7.40%> (-0.04%)	⬇️

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