Now that the async driver is internal, the scala driver is built on top of the reactive streams driver, and both reactive streams and scala are formally part of the java driver repo, it might be time to simplify the driver name as reported in client metadata.

Current driver names in client metadata for 3.x driver

• mongo-java-driver|sync
• mongo-java-driver|legacy
• mongo-java-driver|async
• mongo-java-driver|async| mongo-java-driver-reactivestreams
• mongo-java-driver|async| mongo-scala-driver

Proposed driver names for 4.x driver:

• mongo-java-driver|sync
• mongo-java-driver|legacy
• mongo-java-driver|reactive-streams
• mongo-java-driver|reactive-streams|scala

CC natalya.furmanova