update AMPI and ROMIO to be compatible gcc14 for spack

[ericjbohm]

Fix a gcc 14 "bug" in the ROMIO configure test by explicit return type of int for main function.

Reconcile incompatible function prototypes to the one in the MPI standard.

[ericjbohm]

I managed to resolve a few of the GCC 14 issues, but I'm not sure what to do about the multiple definitions of MPI_Info.

[stwhite91]

Can you provide more info on the multiple definition of MPI_Info issue?

Edit: I found it:

==> Error: ProcessError: Command exited with status 2:
    './build' 'LIBS' 'netlrts-linux-x86_64' 'gcc-14' 'gfortran-14' '-j4' '--destination=/home/runner/work/charm/spack/opt/spack/linux-ubuntu24.04-zen2/gcc-14.2.0/charmpp-main-7bjnyo7iw57gjkcmiw6laaq6gm2p43wj' 'smp' '--build-shared' '--with-production' '-g'

7 errors found in build log:
     955       CC       mpi-io/mpich_fileutil.lo
     956     [ 51%] Building CXX object src/ck-core/CMakeFiles/ck.dir/__/ck-ldb
             /BaseLB.C.o
     957     In file included from /home/runner/work/charm/spack/opt/spack/linu
             x-ubuntu24.04-zen2/gcc-14.2.0/charmpp-main-7bjnyo7iw57gjkcmiw6laaq
             6gm2p43wj/include/ampi/mpi.h:1239,
     958                      from ./adio/include/adio.h:72,
     959                      from mpi-io/mpioimpl.h:15,
     960                      from mpi-io/mpich_fileutil.c:6:
  >> 961     /home/runner/work/charm/spack/opt/spack/linux-ubuntu24.04-zen2/gcc
             -14.2.0/charmpp-main-7bjnyo7iw57gjkcmiw6laaq6gm2p43wj/include/mpio
             .h:58:29: error: conflicting types for 'MPI_Info'; have 'struct MP
             IR_Info *'
     962        58 |   typedef struct MPIR_Info *MPI_Info;
     963           |                             ^~~~~~~~
     964     /home/runner/work/charm/spack/opt/spack/linux-ubuntu24.04-zen2/gcc
             -14.2.0/charmpp-main-7bjnyo7iw57gjkcmiw6laaq6gm2p43wj/include/ampi
             /mpi.h:339:13: note: previous declaration of 'MPI_Info' with type 
             'MPI_Info' {aka 'int'}
     965       339 | typedef int MPI_Info;
     966           |             ^~~~~~~~
     967     /home/runner/work/charm/spack/opt/spack/linux-ubuntu24.04-zen2/gcc
             -14.2.0/charmpp-main-7bjnyo7iw57gjkcmiw6laaq6gm2p43wj/include/mpio
             .h:59:10: warning: "MPI_INFO_NULL" redefined
     968        59 | # define MPI_INFO_NULL         ((MPI_Info) 0)
     969           |          ^~~~~~~~~~~~~
     970     /home/runner/work/charm/spack/opt/spack/linux-ubuntu24.04-zen2/gcc
             -14.2.0/charmpp-main-7bjnyo7iw57gjkcmiw6laaq6gm2p43wj/include/ampi
             /mpi.h:[258](https://github.com/charmplusplus/charm/actions/runs/12940126862/job/36093730796?pr=3866#step:4:259):9: note: this is the location of the previous definitio
             n
     971       258 | #define MPI_INFO_NULL      (-1)
     972           |         ^~~~~~~~~~~~~
  >> 973     Fatal Error by charmc in directory /home/runner/work/charm/spack/o
             pt/spack/linux-ubuntu24.04-zen2/gcc-14.2.0/charmpp-main-7bjnyo7iw5
             7gjkcmiw6laaq6gm2p43wj/src/libs/ck-libs/ampi/romio-prefix/src/romi
             o