Both:

• jstests/sharding/lookup_from_config_cache_chunks.js
• jstests/sharding/query/lookup_graph_lookup_foreign_becomes_sharded.js
  Are wrongly assuming that the shardedLookup feature flag exists. In fact this tests run in the multiversion suite and the flag has been introduced in 5.1

The goal of this ticket is to fix those tests and remove the disabled_due_to_server_58295 tag.