Fix up relevant CA1416 warnings #26593
Draft
+248
−249
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Description of Change
Unfortunately CA1416 still isn't reliable on iOS/Catalyst due to
dotnet/roslyn-analyzers#7239
You can work around the issue but it makes the code somewhat confusing to deal with, so we opted to not go the workaround path.
That being said, there were a lot of useful other bits that @stephen-hawley contributed into this PR #20477.
This PR pulls out all the bits that do fix some areas where we weren't checking for the right OperatingSystem Version and it converts to some newer APIS for iOS 18;