Fix #73234: Emulated statements let value dictate parameter type

Fix #73234: Emulated statements let value dictate parameter type

The prepared statement emulator (pdo_sql_parser.*) figures out how to quote
each query parameter. The intended type is specified by the PDO::PARAM_*
consts, but this direction wasn't always followed. In practice, queries could
work as expected, but subtle errors could result. For example, a numeric string
bound as PDO::PARAM_INT would be sent to a driver's quote function. While these
functions are told which type is expected, they generally assume values are
being quoted as strings. This can result in implicit casts, which are bad for
performance.

This commit includes the following changes:
 - Cast values marked as bool/int/null to the appropriate type and bypass the
   driver's quote function.
 - Save some memory by dropping the temporary zval used for casting.
 - Avoid a memory leak if the driver's quote function produces an error.
 - Appropriate test suite updates.