add missing exit condition after Yandex Cloud domain retrieval

[paskal]

Before that change, dns_zone_id was not used, and cloud_id was used for retrieval every time.

[paskal]

And again, thanks for the tests. They make the expectation of the provider super clear.

[paskal]

Gentle ping @adferrand for review.

[paskal]

Another gentle ping to @adferrand for review.

[adferrand]

Thanks a lot. It makes a better use of the available parameters and less requests at the end. LGTM!