Fix build on main

[Al12rs]

Main was broken after #949
ALoadoutSynchronizer() was expected to have a single parameter by many subclasses or users, which broke when the Os param was added

[Al12rs]

Tests are broken because they don't have access to IOSInformation. Does anyone know what .Add function adds that in Startup.cs?

Edit:
Found it, was AddCrossPlatform()

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (f0c1f95) 0.00% compared to head (8a46080) 58.65%.

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Additional details and impacted files

@@            Coverage Diff            @@
##           main     #955       +/-   ##
=========================================
+ Coverage      0   58.65%   +58.65%     
=========================================
  Files         0      630      +630     
  Lines         0    20272    +20272     
  Branches      0     1558     +1558     
=========================================
+ Hits          0    11891    +11891     
- Misses        0     8015     +8015     
- Partials      0      366      +366     

Flag	Coverage Δ
Linux	58.02% <60.00%> (?)
Windows	57.91% <60.00%> (?)
clean_environment_tests	58.64% <60.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ons.Loadouts.Synchronizers/ALoadoutSynchronizer.cs	92.30% <100.00%> (ø)
tests/NexusMods.CLI.Tests/Startup.cs	0.00% <0.00%> (ø)
tests/NexusMods.DataModel.Tests/Startup.cs	0.00% <0.00%> (ø)

... and 627 files with indirect coverage changes