Add generic job factories

[pmrv]

A JobFactory is a light weight object that represents a certain type of pyiron job. It can be used by abstract workflows to run jobs without knowing what the reference model and the detailed parameters e.g. for the HPC queue are, without having to pass all of this information through all layers of the workflow.

[github-actions]

👈 Launch a binder notebook on branch pyiron/pyiron_contrib/jobs

[pmrv]

This may be a bit cryptic (the example in the docstring might help or it might not), but I use these objects in a lot of my work now and I need them to live somewhere. If this is not wanted in contrib, I can put them up separately.

[coveralls]

Pull Request Test Coverage Report for Build 7033608708

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• 0 of 0 changed or added relevant lines in 0 files are covered.
• 549 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.2%) to 16.375%

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Files with Coverage Reduction	New Missed Lines	%
atomistics/atomicrex/structure_list.py	43	0.0%
atomistics/atomistics/master/qha.py	46	0.0%
atomistics/atomicrex/potential_factory.py	145	0.0%
atomistics/atomicrex/function_factory.py	315	0.0%

Totals
Change from base Build 6628417645:	-0.2%
Covered Lines:	2524
Relevant Lines:	15414

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💛 - Coveralls