Test: scheduler: update regression tests for colocation change

Now that chained colocations are incorporated at an attenuated score,
scores in some tests have changed.

The only test whose result changes (colocation-vs-stickiness) is a fix:
INFINITY stickiness now correctly outweighs an optional anti-colocation of a
group with another resource. (Previously, the group's internal INFINITY
colocations would be incorporated at full strength, resulting in banning the
primary.)