Add a new property to the NewConnection event called is_atlas_url.

is_atlas_url will true be if the URL of the cluster matches our existing Atlas check regex.
is_atlas will become is_atlas_url OR the result of the atlasVersion command.

For example, in Compass we do this: https://github.com/mongodb-js/compass/blob/main/packages/data-service/src/instance-detail-helper.ts#L139-L141