net10.0 FSharp.Core surface area test

#20229 added `VerifyNetStandard21SurfaceAreaFSharpCore` but the original test also checks against ns21 baselines.

https://github.com/dotnet/fsharp/blob/main/tests/FSharp.Core.UnitTests/SurfaceArea.fs

Where should the net10.0 specific additions go?

Start with tests/FSharp.Core.UnitTests/SurfaceArea.fs and read VerifyNetStandard21SurfaceAreaFSharpCore alongside the existing baselines. Determine where framework-specific surface-area additions are grouped for net10.0, then update the appropriate section and run the surface-area tests to confirm the net10.0 check passes.

Written by the indexing model from the issue text.