Cannot set Percentiles on statsd.Statsd due to unexported number type

[jordanbertasso]

In https://github.com/influxdata/telegraf/pull/16363 the Number type in the statsd package was unexported here. However, it is required in order to set the Percentiles field on statsd.Statsd.

I believe this may have been unexported in error, as now it's not possible to set the Percentiles field here via the public API as far as I can tell.