The tests use different patterns to locate if a table is created because of a resharding operations. Considering that "system.resharding" could be contained in a user table, it is necessary to have a more accurate expression to decide if the table comes from resharding. Examples of usage:

jstests/libs/check_routing_table_consistency_helpers.js

https://github.com/10gen/mongo/blob/19c93948d1ad3f57867ea0a6a29a5fb3d7f5dcc9/jstests/sharding/resharding_change_stream_internal_ops.js#L116

https://github.com/10gen/mongo/blob/19c93948d1ad3f57867ea0a6a29a5fb3d7f5dcc9/jstests/change_streams/show_resharding_system_events.js#L64

https://github.com/10gen/mongo/blob/19c93948d1ad3f57867ea0a6a29a5fb3d7f5dcc9/jstests/libs/override_methods/rs_endpoint.js#L48