fix: throwing new exception from post hook lead to memory leak

[pdelewski]

All tests are passing now on debug build without memory problems

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PHP         : /Users/pdelewski/php-bin/DEBUG/bin/php 
PHP_SAPI    : cli
PHP_VERSION : 8.2.0-dev
ZEND_VERSION: 4.2.0-dev

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TIME START 2022-11-24 11:27:20
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PASS Check if otel_instrumentation is loaded [tests/001.phpt] 
PASS Check if hook returns true [tests/002.phpt] 
PASS Check if hooks are invoked [tests/003.phpt] 
PASS Check if multiple hooks are invoked [tests/004.phpt] 
PASS Check if hooks receives function information [tests/005.phpt] 
PASS Check if hooks receives arguments and return value [tests/006.phpt] 
PASS Check if hook receives exception [tests/007.phpt] 
PASS Check if hook can modify arguments [tests/008.phpt] 
PASS Check if hook can modify not provided arguments [tests/009.phpt] 
PASS Check if hook can modify return value [tests/010.phpt] 
PASS Check if hooks are invoked for closures [tests/function_closure.phpt] 
PASS Check if hooks are invoked for first class callables [tests/function_first_class_callable.phpt] 
PASS Check if hooks receive modified exception [tests/multiple_hooks_modify_exception.phpt] 
PASS Check if hooks receive modified arguments [tests/multiple_hooks_modify_params.phpt] 
PASS Check if hooks receive modified returnvalue [tests/multiple_hooks_modify_returnvalue.phpt] 
XFAIL Check if hooks are invoked only once for reimplemented interfaces [tests/reimplemented_interface.phpt]   XFAIL REASON: Repeated interfaces are not deduplicated, A::m() hook is added for C->A and C->B->A.