Add methods

• getSupportedHashTypes(): array
• isHashTypeSupported (int $hashType): bool

to \eZ\Publish\Core\Repository\User\PasswordHashServiceInterface and refactor existing \eZ\Publish\API\Repository\Values\User\User::SUPPORTED_PASSWORD_HASHES usages

This allows to decorate  PasswordHashService in 3rd-party bundle and add support for custom password hash types