Temporary variable indicating column field type ID should be
reset to default for loop iteration (i.e. every column in the
record set. The old buggy code made it persist across all columns
leading to invalid reads from the buffer, if for example a DATE
column was preceded by a VARCHAR column.
For unixODBC, use ODBC version as defined by it (as of v2.2.14 it is 3.5).
This allows us to use newer features like SQL_DESC_OCTET_LENGTH (which
returns the number of bytes required to store the data). This fixes the issue
in #60616. If the newer version is not available, over-allocate to accomodate
4-byte Unicode characters for CHAR and VARCHAR datatypes (and their Wide
counterparts).
version.
Fixed a couple of failing tests.
