We need to audit the query stats testing done for the 7.0 branch to ensure that nothing got lost in the backport. We should make sure that the following tests exists and are running as expected:

• Query stats variants running on the 7.0 waterfall
• Agg optimization fuzzer with query stats enabled
• Mutational fuzzer with query stats enabled
• Test suites (including correct excluded tests)
  • query_stats_aggregation_passthrough
  • query_stats_mongos_aggregation_passthrough
  • query_stats_mongos_passthrough
  • query_stats_passthrough

• Query stats jstests in the following directories:
  • noPassthrough
  • noPassthroughWithMongod
  • with_mongot
  • aggregation
  • auth
  • concurrency
  • multiversion
  • audit
  • enterprise/no_passthrough