Enable ext/pdo/tests/pdo_022.phpt test

[Girgias]

This PDO test is mark as XFAIL as "Feature not implemented no test makes sense" but is actually implemented...

However as it tests the PDOStatement::getColumnMeta() method it might make more sense that each individual driver has their own corresponding test than a common PDO test.

[cmb69]

But see https://bugs.php.net/bug.php?id=46508#1246268547.

[Girgias]

But see https://bugs.php.net/bug.php?id=46508#1246268547.

Well... maybe that's something which should be done, or because it's been already 12 years the current behaviour is the current spec.