[swh-search] Investigate long search queries response time

Most of the search queries take around 3-5 seconds which isn't good for UX. We should do some profiling tests, find out the bottlenecks, and fix them.

migrated/migration$1353 contains a list of queries for which we should run Kibana profiling tests to understand if the problem originates from elasticsearch itself. If it doesn't, we need to investigate other parts of the stack.

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Migrated from T4251 (view on Phabricator)