Remove the deprecated bundled statistics providers #26055

Is your feature request related to a problem or challenge?

#25969 deprecated the statistics providers bundled in datafusion_physical_plan::operator_statistics, since they duplicate or replace the estimation each operator does in statistics_from_inputs. The API health policy deprecation guidelines say deprecated APIs remain for

6 major versions or 6 months, whichever is longer

so they can be removed in 62.0.0 at the earliest (and no earlier than 6 months after the 56.0.0 release).

Describe the solution you'd like

Remove the items above, their tests, and the helpers only they use (computed_with_row_count, rescale_byte_size).

Describe alternatives you've considered

N/A

Additional context

Follow-up to #25969 (closes #25571).