Move predicate data setting into constructor

[nedsalk]

The team agreed in one of the weekly syncs that it's more straightforward and easier to reason about predicate data if we'd be setting it only via the Predicate constructor.

// current
const predicate = new Predicate(...);
predicate.setData(data);

// proposed
const predicate = new Predicate(..., data);

This implies removing the predicate.setData method.