Add images of empowerment to meta search

[zackkrida]

Fixes

Related to https://github.com/WordPress/openverse-catalog/issues/39

Description

Adds the "Images of Empowerment" collection to image meta search. A good first step for integrating them into the catalog.

Technical details

Tests

Screenshots

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main or master).
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

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[obulat]

Great to see this provider in search!