[data] add rows outputted to data metrics

[Zandew]

Why are these changes needed?

Exports rows outputted as a data metric to the ray dashboard.

Adds it to the ray data overview, replacing bytes outputted in the table.
Also adds CPU/GPU usage to the ray data overview

Related issue number

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[scottsun94]

Thanks. Two comments?

1. What does cpu usage mean here? Physical cpu usage or?
2. The progress bar is getting too short. Can we set a min width for it and enable horizontal scaling if there are too many rows?

[Zandew]

1. What does cpu usage mean here? Physical cpu usage or?

It is logical, the image is outdated, but there's a tooltip that clarifies this. I thought the header was getting too long so I put it in a tooltip

2. The progress bar is getting too short. Can we set a min width for it and enable horizontal scaling if there are too many rows?

👍

[scottsun94]

Can we say "Logical CPU usage (current / max)" or "Logical GPU usage (current / max)" then? We can wrap the text to avoid a really wide column, like this:

Btw, can we use lower case for the "current" and "max"?