Leading 0 in number form type with region code context

[bk-tb]

If the widget PhoneNumberType::WIDGET_COUNTRY_CHOICE is used, the number in the number form type contains leading zeros. In the context of the select form type of the region code this is unexpected: +49 02408 95660 instead of +49 2408 95660

Currently the PhoneNumberToArrayTransformer uses
'number' => $util->format($phoneNumber, PhoneNumberFormat::NATIONAL),

Perhaps the better way is to strip the leading zeros:

'number' => $this->getNationalNumberForRegionCodeContext($util->format($phoneNumber, PhoneNumberFormat::NATIONAL), $phoneNumber),

    private function getNationalNumberForRegionCodeContext(string $nationalNumber, PhoneNumber $phoneNumber): string
    {
        if (!$phoneNumber->hasItalianLeadingZero() && $phoneNumber->getNumberOfLeadingZeros() > 0 && str_starts_with($nationalNumber, str_repeat('0', $phoneNumber->getNumberOfLeadingZeros()))) {
            return substr($nationalNumber, $phoneNumber->getNumberOfLeadingZeros());
        }
        return $nationalNumber;
    }

Other numbers perhabs for unit tests:
+43533765123
+41625571123
+390669812123 (hasItalianLeadingZero)
+390863530123
+39393508123

[ngrie]

For reference, there already was an issue for this in the original repository: misd-service-development#174