Typ: Fix io stata type ignores
xref #37715

Hi all, first time contributing, please let me know if all is OK process-wise (e.g. commit message, if it is OK that the changes are not squashed)

Regarding the changed code - I added c_data_large for consistency (c_data_small was required to fix type: ignore), can remove if you think that it is unnecessary
@twoertwein lgtm merge on green. Thank you @FactorizeD doc failure looks unrelated.