Gate new error func arg display behind display_error_function_args

This is a useful feature, but enabling it by default requires rewriting
every PHPT file's output section. Since that would be a hellish diff to
make and to review, I think the best option is unfortunately, another
INI option. We can enable this for prod/dev recommended INIs, but make
sure it's disabled for the test runner.

This takes some inspiration from the discussion in GH-17056, which has
similar problems to this PR.

main/main.c

@@ -738,6 +738,7 @@ PHP_INI_BEGIN()
 
 	STD_PHP_INI_ENTRY_EX("display_errors",		"1",		PHP_INI_ALL,		OnUpdateDisplayErrors,	display_errors,			php_core_globals,	core_globals, display_errors_mode)
 	STD_PHP_INI_BOOLEAN("display_startup_errors",	"1",	PHP_INI_ALL,		OnUpdateBool,			display_startup_errors,	php_core_globals,	core_globals)
+	STD_PHP_INI_BOOLEAN("display_error_function_args",	"0",	PHP_INI_ALL,		OnUpdateBool,			display_error_function_args,	php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("enable_dl",			"1",		PHP_INI_SYSTEM,		OnUpdateBool,			enable_dl,				php_core_globals,	core_globals)
 	STD_PHP_INI_BOOLEAN("expose_php",			"1",		PHP_INI_SYSTEM,		OnUpdateBool,			expose_php,				php_core_globals,	core_globals)
 	STD_PHP_INI_ENTRY("docref_root", 			"", 		PHP_INI_ALL,		OnUpdateString,			docref_root,			php_core_globals,	core_globals)
@@ -1068,7 +1069,13 @@ PHPAPI ZEND_COLD void php_verror(const char *docref, const char *params, int typ
 	/* if we still have memory then format the origin */
 	if (is_function) {
 		zend_string *dynamic_params = NULL;
-		dynamic_params = zend_trace_current_function_args_string();
+		/*
+		 * By default, this is disabled because it requires rewriting
+		 * almost all PHPT files.
+		 */
+		if (PG(display_error_function_args)) {
+			dynamic_params = zend_trace_current_function_args_string();
+		}
 		origin_len = (int)spprintf(&origin, 0, "%s%s%s(%s)", class_name, space, function, dynamic_params ? ZSTR_VAL(dynamic_params) : params);
 		if (dynamic_params) {
 			zend_string_release(dynamic_params);

main/php_globals.h

@@ -61,6 +61,7 @@ struct _php_core_globals {
 
 	uint8_t display_errors;
 	bool display_startup_errors;
+	bool display_error_function_args;
 	bool log_errors;
 	bool ignore_repeated_errors;
 	bool ignore_repeated_source;