[FEATURE] Allow setting 'dir' for preflight (drc and erc logs)

[oliv3r]

Currently, the only way to set the outputs for preflights is to set the global output dir. This works, but affects everything else.

Instead, we should introduce the same properties for drc and erc, so we can influence their output.

I don't know what outputs preflight generates besides erc and drc, but if this is in conflict, we can do the same as with update_xml;

run_drc:
  enabled: true
  dir: 'reports'