Changing example for Zj MiNNLOPS

Update example for Zj MiNNLO+PS to contain the allowed decay modes and testing settings for grid integration

@sutuncay

This merge request affects 1 package:

• Generators/PowhegControl

This merge request affects 9 files:

• Generators/PowhegControl/python/parameters/registry.py
• Generators/PowhegControl/python/processes/powheg/Z_EW.py
• Generators/PowhegControl/python/processes/powheg/bb.py
• Generators/PowhegControl/python/processes/powheg/chi0chi1.py
• Generators/PowhegControl/python/processes/powheg/fourtops.py
• Generators/PowhegControl/python/processes/powheg/gg4l.py
• Generators/PowhegControl/python/processes/powheg/tt.py
• Generators/PowhegControl/python/processes/powheg/ttH.py
• Generators/PowhegControl/share/example/processes/Zj_MiNNLO/mc.PhPy8EG_A14NNPDF23_Zj_MiNNLO_example.py

Adding @asaibel ,@tpelzer ,@strichte ,@dhayden ,@janovak ,@averbyts as watchers

added Generators Powheg main review-pending-level-1 labels

CI Result SUCCESS (hash ede2e513)

	Athena	AthGeneration
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output (remote access info)

Changes are fine and CI succeeds, approving for L1.

-L1

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit f0d45465