WP.com: Change site_blacklisted and blacklisted_domain error names

[sarayourfriend]

This will require the same process as a database column change:

1. Decide on a new error name and duplicate the places that handle the original error to also check for the new error name
2. Change the error name being emitted
3. Remove the old error name

This will require coordination across multiple projects, namely WP.com, Jetpack (in the case of site_blacklisted) and Calypso.

Related to #43395

[github-actions]

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[sergeymitr]

We removed site_blacklisted in #72285