Add support for suppression of GC transition in crossgen2

[AaronRobinsonMSFT]

Work was done to add support in crossgen for the suppression of GC transitions. This should also be done in crossgen2.

https://github.com/dotnet/coreclr/blob/0f71a90f41cfae2a9675bb37150d3a7d4e8b1423/src/zap/zapimport.cpp#L1404-L1421

/cc @MichalStrehovsky @davidwrighton @sergiy-k