fix: make site suggestion flow consistent

[tinfoil-knight]

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Summary

Fixes #1772

Earlier while creating a new site, the name suggested by the CLI and the name with which the site was actually created were different. This happened because the name suggested by the CLI wasn't considered and an empty name field was passed to the Netlify API which assigned a random site name on its own.

This PR fixes that behavior. Names suggested by the CLI will be set consistently when creating the site.

Test Run Post Fix with init

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[erezrokah]

Thanks @tinfoil-knight 🚀