_mongoc_topology_description_check_compatible determines the topology to be incompatible if any server is outside of the compatible range.

Since we supported wire version 0, and that was the default value for a reset/disconnected server_description nothing was ever outside of the range.

Now that minimum wire version is 2, a unknown state server_description will have wire_version=0, yet still part of the topology (just not selectable).

However, now the compatible check will fail because it found a server outside of the range.

I think we should probably maybe initialize the server_descriptions with wire version -1 or something, or otherwise skip checks for servers in unknown state.