Fix pytest in Yandexcloud if 0.384.0

[jscheffl]

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[potiuk]

Hmm back-compat does not work for previous versions of yandexcloud.

[jscheffl]

Hmm back-compat does not work for previous versions of yandexcloud.

Mis-interprested how client options are generated, another attempt - just relax and ensure passed string is inside client options.

[jscheffl]

Now fixed.