Fix several remaining IL tests I missed in my assembly name cleanup (#64555)

Fix several remaining IL tests I missed in my assembly name cleanup (#64555)

I have found out I had a case sensitivity bug in the ILTransform tool
that ended up missing about 50 assemblies with lowercase main() entry
point. This change cleans up the remaining source files and also
supplies an auto-generated class wrapper in tests where the entrypoint
was a global function.

Thanks

Tomas