Fix GH-16450: PDO_ODBC can inject garbage into field values

A previous bug fix[1] relied on ODBC drivers to properly count down the
`StrLen_or_IndPtr` argument for consecutive calls to `

Fix GH-16450: PDO_ODBC can inject garbage into field values

A previous bug fix[1] relied on ODBC drivers to properly count down the
`StrLen_or_IndPtr` argument for consecutive calls to `SQLGetData()`.
Apparently, not all drivers handle this correctly, so we cannot assert
they do. Instead we fall back to the old behavior for drivers which
would violate the assertion.

A test against SQLServer (which we currently use in CI) would not make
sense, since the respective drivers do not exhibit that behavior.
Instead we target the regression test especially to a MS Access
database.

Since there is apparently no way to easily create an MS Access database
programmatically, we commit a minimal empty DB which is used for the
regression test, and could also be used by other test cases.

[1] <bccca0b53aa60a62e2988c750fc73c02d109e642>

Closes GH-16587.

show more ...