Fix PDO_Firebird tests for 32bit

These tests are failing because the integers are too large to be cast
to a PHP int. We fix this by expecting either an int or a string.

Closes

Fix PDO_Firebird tests for 32bit

These tests are failing because the integers are too large to be cast
to a PHP int. We fix this by expecting either an int or a string.

Closes GH-16278.

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ext/pdo_firebird: Fixed GH-15604 Always make input parameters nullable (#15605)

Fixes #15604
Closes #15605