[main][runtime] iOS app builds are failing

[LoopedBard3]

iOS app builds for mono testing are failing to build resulting in the iOS testing jobs not being run. An example failure is available here: https://dev.azure.com/dnceng/internal/_build/results?buildId=2130635&view=results under 'ios-arm64 release iOSMono'-> 'Build HelloiOS AOT Sample...'. The main failure seems to be 'ld: symbol(s) not found for architecture arm64', with full output available following the above steps (too large to put in github comment).

cc: @SamMonoRT, are you aware of any recent changes that may be causing this or someone that would have an idea?

[SamMonoRT]

@steveisok @akoeplinger - any known issues with iOS apps ?

[SamMonoRT]

/cc @ivanpovazan

[steveisok]

This regressed likely because of dotnet/runtime#81919. It shifted where the gss framework got linked in and needs changed. I'll put up a fix.