sixth round of fixes

Initialize extension handle for internal functions in PHP 8.4 to fix segfault
when `opcache.jit=function`. PHP 8.4 includes observer API optimizations. One
of the optimization requires extensions that use observer API, and use
extension handle for user functions, to also initialize extension handle for
internal functions - see php/php-src#14252.

Author: lavarou

agent/php_minit.c

@@ -736,6 +736,13 @@ PHP_MINIT_FUNCTION(newrelic) {
 #if ZEND_MODULE_API_NO >= ZEND_8_0_X_API_NO /* PHP 8.0+ */
   NR_PHP_PROCESS_GLOBALS(zend_offset) = zend_get_resource_handle(dummy);
   NR_PHP_PROCESS_GLOBALS(op_array_extension_handle) = zend_get_op_array_extension_handle("newrelic");
+#if ZEND_MODULE_API_NO >= ZEND_8_4_X_API_NO /* PHP 8.4+ */
+  /* When observer API is used by an extension, both handles (for user
+   * and internal functions) must be initialized, even when one of them
+   * is not used (as in our case). Observer API was changed in PHP 8.4.
+   * For more details see: https://github.com/php/php-src/pull/14252 */
+  (void) zend_get_internal_function_extension_handle("newrelic");
+#endif
 #else
   NR_PHP_PROCESS_GLOBALS(zend_offset) = zend_get_resource_handle(&dummy);
 #endif