edk2: #ifdef out STATIC_ASSERTS when !_STANDALONE

All FreeBSD ABIs do not conform to the EDK2 preconditions (except boot
loader). These asserts test those things. Since the code from EDK2 that
we use does not depend on L" and L' details, commenting them out is fine.

Note: This was not in the update since I had to redo it too many times
due to lost races and it was a tricky update.

Sponsored by: Netflix