Disable global state test on Windows

It looks like the config.w32 uses CHECK_HEADER_ADD_INCLUDE to add the include
path to libxml into the search path.
That doesn't happen in zend-test.
To add to the Windows trouble, libxml is statically linked in, ext/libxml can
only be built statically but ext/zend-test can be built both statically and
dynamically.
So the regression tests won't work in all possible configurations anyway on Windows.
All of this is no problem on Linux because it just uses dynamic linking
and pkg-config, without any magic.

Signed-off-by: Ben Ramsey <ramsey@php.net>

(cherry picked from commit 62228a2)

Author: nielsdos

ext/dom/tests/libxml_global_state_entity_loader_bypass.phpt

@@ -5,6 +5,7 @@ GHSA-3qrf-m4j2-pcrr (libxml global state entity loader bypass)
 if (!extension_loaded('libxml')) die('skip libxml extension not available');
 if (!extension_loaded('dom')) die('skip dom extension not available');
 if (!extension_loaded('zend-test')) die('skip zend-test extension not available');
+if (!function_exists('zend_test_override_libxml_global_state')) die('skip not for Windows');
 ?>
 --FILE--
 <?php

ext/simplexml/tests/libxml_global_state_entity_loader_bypass.phpt

@@ -5,6 +5,7 @@ GHSA-3qrf-m4j2-pcrr (libxml global state entity loader bypass)
 if (!extension_loaded('libxml')) die('skip libxml extension not available');
 if (!extension_loaded('simplexml')) die('skip simplexml extension not available');
 if (!extension_loaded('zend-test')) die('skip zend-test extension not available');
+if (!function_exists('zend_test_override_libxml_global_state')) die('skip not for Windows');
 ?>
 --FILE--
 <?php

ext/xmlreader/tests/libxml_global_state_entity_loader_bypass.phpt

@@ -5,6 +5,7 @@ GHSA-3qrf-m4j2-pcrr (libxml global state entity loader bypass)
 if (!extension_loaded('libxml')) die('skip libxml extension not available');
 if (!extension_loaded('xmlreader')) die('skip xmlreader extension not available');
 if (!extension_loaded('zend-test')) die('skip zend-test extension not available');
+if (!function_exists('zend_test_override_libxml_global_state')) die('skip not for Windows');
 ?>
 --FILE--
 <?php

ext/zend_test/test.c

@@ -32,7 +32,7 @@
 #include "test.h"
 #include "test_arginfo.h"
 
-#ifdef HAVE_LIBXML
+#if defined(HAVE_LIBXML) && !defined(PHP_WIN32)
 # include <libxml/globals.h>
 # include <libxml/parser.h>
 #endif
@@ -311,6 +311,7 @@ static ZEND_FUNCTION(zend_get_current_func_name)
     RETURN_STR(function_name);
 }
 
+#if defined(HAVE_LIBXML) && !defined(PHP_WIN32)
 static ZEND_FUNCTION(zend_test_override_libxml_global_state)
 {
 	ZEND_PARSE_PARAMETERS_NONE();
@@ -322,6 +323,7 @@ static ZEND_FUNCTION(zend_test_override_libxml_global_state)
 	(void) xmlLineNumbersDefault(1);
 	(void) xmlKeepBlanksDefault(0);
 }
+#endif
 
 /* TESTS Z_PARAM_ITERABLE and Z_PARAM_ITERABLE_OR_NULL */
 static ZEND_FUNCTION(zend_iterable)

ext/zend_test/test.stub.php

@@ -171,6 +171,7 @@ function zend_get_map_ptr_last(): int {}
 
     function zend_test_crash(?string $message = null): void {}
 #ifdef HAVE_LIBXML
+#if defined(HAVE_LIBXML) && !defined(PHP_WIN32)
 function zend_test_override_libxml_global_state(): void {}
 #endif