Fix GH-7939: Cannot unserialize IntlTimeZone objects

As it is now, `IntlTimeZone`, `IntlCalendar` and `IntlDateFormatter`
instances can be serialized, but the representation is meaningless, and
unserialization yields uninitialized/unusable objects.  To prevent
users from noticing this too late, we deny serialization of such
objects in the first place.

Author: cmb69

ext/intl/calendar/calendar.stub.php

@@ -2,6 +2,7 @@
 
 /** @generate-class-entries */
 
+/** @not-serializable */
 class IntlCalendar
 {
     private function __construct() {}
@@ -281,6 +282,7 @@ public function setTimeZone($timezone): bool {}
     public function toDateTime(): DateTime|false {}
 }
 
+/** @not-serializable */
 class IntlGregorianCalendar extends IntlCalendar
 {
     /**

ext/intl/calendar/calendar_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 7be0e49d2b898587c4bbefaaf613932ae4786c52 */
+ * Stub hash: 0096dc9e60e2256054d23344e024df1d6527a5fa */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_IntlCalendar___construct, 0, 0, 0)
 ZEND_END_ARG_INFO()
@@ -291,6 +291,7 @@ static zend_class_entry *register_class_IntlCalendar(void)
 
 	INIT_CLASS_ENTRY(ce, "IntlCalendar", class_IntlCalendar_methods);
 	class_entry = zend_register_internal_class_ex(&ce, NULL);
+	class_entry->ce_flags |= ZEND_ACC_NOT_SERIALIZABLE;
 
 	return class_entry;
 }
@@ -301,6 +302,7 @@ static zend_class_entry *register_class_IntlGregorianCalendar(zend_class_entry *
 
 	INIT_CLASS_ENTRY(ce, "IntlGregorianCalendar", class_IntlGregorianCalendar_methods);
 	class_entry = zend_register_internal_class_ex(&ce, class_entry_IntlCalendar);
+	class_entry->ce_flags |= ZEND_ACC_NOT_SERIALIZABLE;
 
 	return class_entry;
 }

ext/intl/dateformat/dateformat.stub.php

@@ -2,6 +2,7 @@
 
 /** @generate-class-entries */
 
+/** @not-serializable */
 class IntlDateFormatter
 {
     /**

ext/intl/dateformat/dateformat_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 82f90e7b0528b2b3515c086763dba4de0f92dfa7 */
+ * Stub hash: c7c0d08433ab9dbf59777072550895d85294aad4 */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_IntlDateFormatter___construct, 0, 0, 1)
 	ZEND_ARG_TYPE_INFO(0, locale, IS_STRING, 1)
@@ -141,6 +141,7 @@ static zend_class_entry *register_class_IntlDateFormatter(void)
 
 	INIT_CLASS_ENTRY(ce, "IntlDateFormatter", class_IntlDateFormatter_methods);
 	class_entry = zend_register_internal_class_ex(&ce, NULL);
+	class_entry->ce_flags |= ZEND_ACC_NOT_SERIALIZABLE;
 
 	return class_entry;
 }

ext/intl/timezone/timezone.stub.php

@@ -2,6 +2,7 @@
 
 /** @generate-class-entries */
 
+/** @not-serializable */
 class IntlTimeZone
 {
     private function __construct() {}

ext/intl/timezone/timezone_arginfo.h

@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 3f945431687a2f45b0ec8c3a6435ef68008c75ad */
+ * Stub hash: 2ec7a46ca205dfeb9ef0dc3c8e8d78bce1cf43be */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_IntlTimeZone___construct, 0, 0, 0)
 ZEND_END_ARG_INFO()
@@ -169,6 +169,7 @@ static zend_class_entry *register_class_IntlTimeZone(void)
 
 	INIT_CLASS_ENTRY(ce, "IntlTimeZone", class_IntlTimeZone_methods);
 	class_entry = zend_register_internal_class_ex(&ce, NULL);
+	class_entry->ce_flags |= ZEND_ACC_NOT_SERIALIZABLE;
 
 	return class_entry;
 }