Replace `SQLExtendedFetch` with `SQLFetchScroll` in ext/odbc

[NattyNarwhal]

Description

SQLExtendedFetch is deprecated. Now that we can assume ODBC 3.x in 8.5 (and especially with a driver manager to handle ancient drivers, in case), we should use SQLFetchScroll instead. PDO_ODBC is already using this. Previously mentioned before, in i.e. this comment.

May be wise to wait on cleanups in GH-15727, since that will remove ifdef soup for ancient drives.