PeriodicShardedIndexConsistencyChecker thread on jstests can cause unintended shard refreshes

Problem

The presence of the PeriodicShardedIndexConsistencyChecker thread causes unintended refreshes on shards in all config server stepdown suites. Js tests that rely on a shard's metadata being stale can sporadically fail due to this thread running on stepup.

Possible Solutions

• Auditing all jstests that rely on stale shard metadata and disabling the periodic thread (this has been done before).
• Disabling the thread altogether on config server stepdown suites, and enabling it on targeted tests that test the behavior of the periodic thread.

Proven Affected Tests

• https://github.com/mongodb/mongo/blob/master/jstests/sharding/cleanup_orphaned_cmd_prereload.js