Exclude "s390x" for bullseye+ (due to libffi6 vs libffi7)
Exclude "s390x" for bullseye+ (due to libffi6 vs libffi7)

> `pypy3: error while loading shared libraries: libffi.so.6: cannot open shared object file: No such file or directory`

docker-library/pypy,infosiftr/pypy