Fix missing dependencies and glibc build failures (#9106)

* bison: Add missing build dependencies

bison also depends on cmp, which is currently not available in Spack.

* help2man: Add missing build dependency

* m4: Fix build with newer versions of glibc

* openssl: Add missing build dependency

openssl's configure script is actually a Perl script.

* texinfo: Add missing perl dependency

* diffutils: New package

* findutils: Fix build with newer versions of glibc

* mvapich2, mpich: Add missing findutils dependency