Currently, the "search in metadata (instead of URL)" option of the archive search is not tested by frontend tests.
To fix this, we need to:
- Fill the indexer storage with some test metadata; either by inserting it directly or by calling a Metadata Indexer, see swh-web/swh/web/tests/data.py
- Write the test itself in cypress/integration/origin-search.spec.js that checks there's a result when searching for a subset of this metadata