range function uses eager ok_or on the hot path

[niebayes]

datafusion/datafusion/functions-nested/src/range.rs

Lines 463 to 485 in add66e4

	let neg = TimestampNanosecondType::add_month_day_nano(start, step, start_tz)
	.ok_or(exec_datafusion_err!(
	"Cannot generate timestamp range where start + step overflows"
	))?
	.cmp(&start)
	== Ordering::Less;
	let stop_dt =
	as_datetime_with_timezone::<TimestampNanosecondType>(stop, stop_tz)
	.ok_or(exec_datafusion_err!(
	"Cannot generate timestamp for stop: {}: {:?}",
	stop,
	stop_tz
	))?;
	let mut current = start;
	let mut current_dt =
	as_datetime_with_timezone::<TimestampNanosecondType>(current, start_tz)
	.ok_or(exec_datafusion_err!(
	"Cannot generate timestamp for start: {}: {:?}",
	current,
	start_tz
	))?;