Add percentiles to the aggregation section of data explorer

we should add p90, p99, p99.9
```
|> quantile(
column: "_value",
q: 0.999,
method: "estimate_tdigest",
compression: 1000.0,
)
```


Start by locating the data explorer's aggregation section and the code that builds its available percentile options. Use the issue's quantile example as the reference for p90, p99, and p99.9, then verify in the data explorer that all three percentiles appear and produce results.

Written by the indexing model from the issue text.