ext/intl: Sync IntlTimeZone object errors for invalid display types

[LamentXU123]

Now, IntlTimeZone::getDisplayName() handled invalid display_type values before fetching the object, so it only updated the global intl error state.

That is,

<?php
$tz = IntlTimeZone::createTimeZone('Europe/Lisbon');
var_dump($tz->getDisplayName(false, -1));
var_dump(intl_get_error_message());
var_dump($tz->getErrorCode());
var_dump($tz->getErrorMessage());

returns

bool(false)
string(76) "IntlTimeZone::getDisplayName(): wrong display type: U_ILLEGAL_ARGUMENT_ERROR"
int(0)
string(12) "U_ZERO_ERROR"

but I expect

bool(false)
string(76) "IntlTimeZone::getDisplayName(): wrong display type: U_ILLEGAL_ARGUMENT_ERROR"
int(1)
string(44) "wrong display type: U_ILLEGAL_ARGUMENT_ERROR"

The solution is to move TIMEZONE_METHOD_FETCH_OBJECT after the intl_errors_set func being called. So the object error state is correctly changed.