Make function to create nice list of image types from negative control regions and types

[strixy16]

negative_controls = [f"{negative_control[0]}_{negative_control[1]}" for negative_control in itertools.product(NEG_CONTROL_TYPES, NEG_CONTROL_REGIONS)]
image_types = ["original"] + negative_controls

make above code into a helper function

[strixy16]

Code is in https://github.com/bhklab/readii/blob/katys/r2r/nc_gen_notebook/src/readii/negative_controls_refactor/manager.py

function is called strategy_list, just needs to be merged