refactor: import authoring filter from content_authoring instead

[mariajgrimaldi]

Description

When reviewing openedx/openedx-filters#200, I suggested using the subdomain course_authoring when it was called content_authoring. This PR correctly imports the filter implemented in the PR I previously mentioned from the content_authoring subdomain instead of the course_authoring subdomain. This change was made according to the DDD docs for the Open edX ecosystem: https://openedx.atlassian.net/wiki/spaces/AC/pages/663224968/edX+DDD+Bounded+Contexts

Depends on openedx/openedx-filters#252

Deadline

Once openedx-filters PR is merged.

Other information

I suggest not backporting this breaking change to the sumac branch to not break existing plugins that are using this filter. It'd be better for them to migrate to this fix once Teak is out.

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[feanil]

Makes sense once the upstream PR is merged and released.