add a better display API

[jayshrivastava]

In #623, we add a new rewrite API prior to displaying:

let plan =
    rewrite_distributed_plan_with_dynamic_filters(plan).await?;

// 4. Fold the per-task metrics back into the plan...
let plan =
    rewrite_distributed_plan_with_metrics(plan, DistributedMetricsFormat::Aggregated).await?;

// 5. ...and render it.
println!("{}", display_plan_ascii(plan.as_ref(), true));

It's annoying to have to call those two rewrites.

Ideally, if you set with_distributed_dynamic_filter_collection or with_distributed_metrics_collection, then displaying is handled automatically. One downside to this is that those settings are stored in the SessionConfig, so you would have to pass a SessionConfig to display_plan_ascii, which isn't great.

Another way to do it is to add options to explain_analyze or display_plan_ascii

DisplayOptions {
    metrics_mode: Aggregated | PerTask
    dynamic_filters: bool
}

and have those methods handle the rewrites for you.

I imagine we want to improve the API for both metrics and