Script job support MPI run

[jan-janssen]

Based on our discussion I extended the script job class to support MPI4py to at least have a quick way to use pyiron for an high throughput study.

import os
from pyiron_base import Project

script_py = """\
from mpi4py import MPI

comm = MPI.COMM_WORLD
size = comm.Get_size()
rank = comm.Get_rank()

print(size, rank)
"""

file_name = "test.py"
with open(file_name, "w") as f:
    f.writelines(script_py)

pr = Project("test")
job = pr.create.job.ScriptJob("script")
job.script_path = os.path.abspath(file_name)
job.server.cores = 2
job.enable_mpi4py()
job.run()