Adjust so that we only require FEAT_LSE for osx-arm64 and maccatalyst, not for iOS or tvOS

[tannergooding]

This resolves #119008

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[kg]

If I understand this correctly, we still require AdvSIMD on every arm64 target (which makes sense, iirc it's part of the baseline), but we're changing things so LSE is only required on OSX and MacCatalyst and it's allowed to be missing on iOS and tvOS.

[tannergooding]

If I understand this correctly, we still require AdvSIMD on every arm64 target (which makes sense, iirc it's part of the baseline), but we're changing things so LSE is only required on OSX and MacCatalyst and it's allowed to be missing on iOS and tvOS.

@kg, correct. If we have the minimum iOS/tvOS hardware supported then we can likely be a bit more explicit about them as well. But keeping it at the same as .NET 10 will resolve the CI failure for now (I expect iOS is higher than armv8.0-a in particular)

[akoeplinger]

nit: technically for the simulator variants this doesn't apply since they can only run on an m1 mac host.

[tannergooding]

👍, more than happy to update things if we know certain ones support higher.

I expect iOS in practice will also be higher due to the minimum iPhone version supported.

If we have a more explicit set of docs around what the minimums are, I can work on updating and ensuring its properly tested for those targets

[akoeplinger]

@tannergooding should we backport this?

[tannergooding]

@akoeplinger this was a .NET 11 only change, so there shouldn't be any need to backport.