[Flaky test] Fix basic auth integration test (#15561)

Database slowness while doing audits seems to be causing flakiness in auth ITs.

The failing test is almost always
`ITBasicAuthConfigurationTest.test_avaticaQuery_datasourceAndContextParamsUser`
but in some rare cases, other tests fail too. Alternately, this failing test has been seen to pass too.

It is most likely because the auth changes are not able to propagate in time from
the coordinator to other services.

Fix: Just log the audits rather than persisting them to database.
Most audits have been newly added and it is okay to not have them persisted.
Moreover, logging audits can also be more beneficial while debugging an IT.

integration-tests/docker/environment-configs/common

@@ -77,6 +77,7 @@ druid_coordinator_kill_supervisor_period=PT10S
 druid_coordinator_kill_supervisor_durationToRetain=PT0M
 druid_coordinator_period_metadataStoreManagementPeriod=PT10S
 druid_sql_planner_authorizeSystemTablesDirectly=true
+druid_audit_manager_type=log
 
 # Testing the legacy config from https://github.com/apache/druid/pull/10267
 # Can remove this when the flag is no longer needed