doc: bsim: Add three more rules

On the request of the maintainer.

Background:

We have recently had issues with tests timing out because of the
difference of speed between CI runners and a standard developer machine.

In that case, the logs are printed, and some tests (by yours truly) are
a bit on the chatty side. Github's UI chokes (for a good minute or more
lol) on more than a few hundred lines, so it's a bad experience for
contributors.

Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>