[03]: Replace `--pipelined=True` with `--batch-wait-ms=X`

Instead of choosing between the whole eval to finish or disabling scheduling altogether (i.e. scheduling jobs one by one as they come), something like like "wait X milliseconds to accumulate a batch of jobs, run the solver on this subset, schedule some builds, then wait another X milliseconds to extend the batch and re-run the solver to get a better plan"