Reimplement make_apdb.py for Gen 3

make_apdb.py is a non-Task command-line script. To make it easy to keep database configuration consistent between it and ap_pipe.py, make_apdb.py takes exactly the same config arguments as ap_pipe.py. In Gen 2, it does this by internally reusing ApPipeConfig and two custom argparse.Action classes from CmdLineTask. All of these classes will be removed along with Gen 2.

Develop a new make_apdb.py that matches the interface used to configure the AP Pipeline (or at least the APDB) with the pipetask activator:

pipetask run -c label:config_var.sub_config=6

pipetask run --config label:config_var.sub_config=6

pipetask run -C label:path

pipetask run --configfile label:path

It may be useful to wait until DM-21939 is done, so that we can see exactly what the new ap_pipe.py interface will look like. The current make_apdb.py will work with the Gen 3 pipeline for as long as CmdLineTask is also supported.

Unfortunately, the Gen 3 equivalents of ConfigFileAction and ConfigValueAction do not do any config processing, which is instead tightly coupled to the activator code itself. So the Gen 3 version will have to find a different way to give users a consistent UI.