[Data] Data dashboard shows all Datasets for each job

[bveeramani]

What happened + What you expected to happen

I ran the repro script three times. I expected each dataset to be associated with exactly one job in the dashboard, but I see all three datasets in every job.

Versions / Dependencies

2.10

Reproduction script

import ray
import time


def sleep(row):
    time.sleep(1)
    return row

ray.data.range(10, override_num_blocks=2).map(sleep).materialize()

Issue Severity

Low: It annoys or frustrates me.