Also supported in .NET 9

* https://devblogs.microsoft.com/dotnet/performance-improvemen...

* https://github.com/dotnet/runtime/pull/91227

This instruction at least is very trivial to emit - any sequence of bitwise logic ops over three inputs compiles to one ternlog always. This isn't at all a super-clever instruction, it's more a super-boring one. If anything, it simplifies codegen compared to having to emit a varying amount of instructions for three-operand logic, having to find the best one.