misc/coverage: Add opam to listed origins
swh-search!130 (closed) must be landed and deployed prior landing this as searching opam visit types currently ends up with an error.
Related to T3424
Migrated from D6375 (view on Phabricator)
swh-search!130 (closed) must be landed and deployed prior landing this as searching opam visit types currently ends up with an error.
Related to T3424
Migrated from D6375 (view on Phabricator)