DRIVERS-2877: Follow w: 0 write with a find in spec tests

This will force completion of the w: 0 write, which addresses a TCP-based race condition in the tests

Please complete the following before merging:

[N/A] Update changelog.
[Done] Make sure there are generated JSON files from the YAML test files.
[Done] Test changes in at least one language driver.
[Done] Test these changes against all server versions and topologies (including standalone, replica set, sharded clusters, and serverless).

Note: there are other w: 0 writes in the unified tests but none that appear to be causing issues so leaving them alone for now.

mongodb / specifications