allow inline dummy_implementations (aka ellipsis on the same line) to be disabled

[toppk]

while I do appreciate ruff following black's lead, and I do think that this default not the biggest annoyance in the world, there are many eyes that are used to seeing:

class Foo:
   ...

rather than:

class Foo: ...

The latter seems somehow broken to me. I would like a configuration setting for this and all things that inline code, which at least in much of the code I've seen isn't commonly done.

Hopefully we can use this issue to gauge sentiment on this new formatting style as introduced in:
#8357