Add support for PHP 8.2

[externl]

There are currently several issues that need fixing to support PHP 8.2

• Various Clang warnings (treated as errors)

/opt/homebrew/Cellar/php/8.2.1/include/php/Zend/zend_ini.h:105:22: error: '\f]' command does not terminate a verbatim text block [-Werror,-Wdocumentation]
 *     ws: [ \t\n\r\v\f]

• Our __toString methods do not specify a return type. This causes the following warning:

Warning: IcePHP_Properties::__toString() implemented without string return type in Unknown on line 0

Warning: Ice\ObjectPrx::__toString() implemented without string return type in Unknown on line 0

Warning: IcePHP_Logger::__toString() implemented without string return type in Unknown on line 0

Warning: IcePHP_Endpoint::__toString() implemented without string return type in Unknown on line 0

Warning: IcePHP_Connection::__toString() implemented without string return type in Unknown on line 0

• Lots of crashing with the following error:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 2028208128 bytes) in /Users/joe/Developer/zeroc-ice/ice/3.7/php/test/Ice/acm/Client.php on line 44