DEPR: deprecate irow,icol,iget_value,iget in Series/DataFrame, #10711
closes #10711 

This looks good to me. :+1: 
 Yep, looks good!

Just a few minor comments, and one other thing: for `irow` on a GroupBy, the alternative is not `iloc` (as this will raise), but `nth` or `apply(lambda x: x.iloc[]`). Maybe you can add that one to GroupBy to have another depr warning (instead of the one of `irow` on the dataframe/series)?
 I think all points addressed.
 yes, thanks!
