When we backported https://jira.mongodb.org/browse/SERVER-75725 to v6.0, we ran into https://jira.mongodb.org/browse/SERVER-75833, which meant we forgot to add the new search_pinned_connections_auth suite as a task to the relevant build-variants on 6.0 that are described in evergreen_nightly.yml instead of evergreen.yml. We should add the new task to any build-variants where "search" and "search_auth" tasks are being run in evergreen_nightly.yml