fix animals can block units

[LIFEfreedom]

bug link

It occurs because the unit interaction logic inside TKMUnitActionWalkTo does not let citizens accumulate "timeout" status when blocked by animals, meaning they never try to reroute around them. Animals are ignored in the DoUnitInteraction method.
Regular units use the TKMUnitActionWalkTo action class, which has a complex "social interaction" system—units can negotiate.

Animals, however, use a completely different, simpler movement script—the TKMUnitActionSteer class.
TKMUnitActionWalkTo contains:

// Can't interact with animals
if opponent.IsAnimal then
    Exit;

[Kromster80]

New code around lines L:200 looks too dangerous to include before release without extensive testing.
I will leave this PR until after planned Release (and/or until we have another RC and/or testing framework in place).