Use public tor network directory authority options in chutney
Chutney currently runs authorities with most options at their defaults. But the directory authorities on the public tor network run with a set of standard options.
It would be great to use those options as much as possible in chutney (or even run most networks with them on, and one with them off), so that we are actually testing the code that is running on the real authorities.
For example, when #18319 (moved) is implemented, the directory authorities will set AuthDirPinKeys 1 (the default is 0).